She deactivated this account after I sent back a pretty long-winded thing, I don't know if she read it or not. She's obviously someone extremely troubled and maybe really young but that isn't an excuse for trying this hard to terrorize people.
To ME it's kind of laughable trolling, but that's because I've been on the internet since the 90's, I'm a grown man, and tumblr already knows I'm not any of the things this person might make up about me. Other people who've gotten her gore, porn, threats and accusations in their inboxes have been small blogs with only a few followers, new users, users as young as 13, users with mental illness or traumatic experiences severely exacerbated by the things she was sending.
Imagine being some kid with an already rough life who's trying to form friendships on the limited outlet of social media when all the sudden this totally unknown stranger bombards your inbox with photographs of mutilated bodies and then messages every user in your notes to tell them you're a rapist or something, of course that's fucking scary for a lot of people. Shit, imagine someone who already had to remake their entire online presence to get away from some hardcore weirdo and now they get this shit. They'd have to fear it was all happening again or even that it's their past attacker who managed to hunt them down. It'd be nice if everyone she did this to could find this or other threads about and see that it was all just pointless, meaningless, impersonal spam but I've already heard that some users quit the site altogether because of this individual.
I'm sure if she's still around she'll keep looking at this thread so I just have to say: if you're realizing or ever will realize that you went way, way, way too far here, it isn't too late to be better. Nobody knows your real actual identity as far as I know, so as much as you probably don't deserve to be, you are technically safer and more anonymous than a lot of people you went after.
You could just quit doing this stuff any moment, get some kind of help, and build a safer healthier life for yourself that doesn't revolve around rage towards internet strangers. I don't care what you say anybody did; even if they did those things, they don't warrant your shockingly, preposterously escalated reaction and they aren't worth the amount of time, energy and emotional labor it must take to do what you've been doing.
A couple of your (former?) "friends" have weighed in distancing themselves from you, but they still also throw in how much they hate your original main target, and I can see that their blogs are devoted entirely to high school drama level gossip. These are not good people. These were likely never real friends. How often did they talk to you about things that make you happy, or things you find interesting? Did they mostly share thoughts with you about books or music or cool hobbies or even just casual trivia? Do you have favorite bands or favorite animals or favorite video games, and do those people bother to know or care what any of them are? Or was your average exchange more like "SHE said THIS about HER and should KILL HERSELF, the WHORE BITCH?" Because it really really looks like that's the most common kind of conversation you all have amongst one another, or at best, it's a kind of conversation you're just as likely to have as the last movie you watched.
We all know that type. Speaking of movies, we even see it in a lot of media, and for very good reason, it's always a villain. If that's the dominant kind of socialism you've had, especially since your teens (or you're even still in them) then it must feel like that's just what "friends," do, that they get together and they vent and they gossip and they trash-talk, but that's genuinely not what friendship actually looks like at all and isn't what people can actually bond over in any mutually beneficial way. You should be sharing feelings about things because you find them cool and fun, shit that's special to you, not shit about people you despise or how to get some kind of revenge against them. Get a hobby, literally. Go get yourself into stamp collecting or gardening or comic books or fossils, find stuff that makes you feel good to talk about and people who like talking about those things with you. You've wasted enormous amounts of time now that you could have spent smiling about something cute and nice instead of searching google for crime scene photos or dogfucking as tumblr hatemail ammunition.
I feel kind of cringe writing all this myself, like my cynical internet instincts are telling me this is an embarrassing degree of emotional investment to display in a situation that has so little to do with me - I literally only got two messages from this individual, two days ago - but my one little post about it opened up a rabbit hole I still can't wrap my head around. There are legendary Encyclopedia Dramatica horror tales that still aren't exactly as dumbfounding as this is. I've rarely seen anyone in the last 25 years do so much to try and negatively affect so many people for just so little of a reason. You really do not want that to be what you're primarily remembered for.
And yes, the extremes it has evidently gone to, especially the type of pornographic material sent to some accounts and the relative ages of some targets, does in fact appear to have crossed the very few lines that can get the police or even FBI involved in an internet harassment case. Assuming you're as young as you seem, you not only don't want to be remembered for this kind of shit, but you don't want to lose possibly years of your one and only youth to criminal charges.