Now, why exactly am I able to tell you HOW I know all those accounts are you? Well doing what others have done, with Creepshow. I have followed these exact patterns your supposed accounts have. (Also you don't have DID, stop faking that. I know people with it, and it's fucking gross.)
All of this is the equivalent of guessing what a gift is based on its shape and the sound it makes when you open it. The bulletin entries are also very emotionally charged. It should be noted that nobody is saying they have DID, that a lot more of what is speculated has to do with Tumblr's queue system (more than you think), that people can influence each others' messages in ways that explain the conspiracy theories described, that supporting presumption of guilt as with the fourth bullet isn't a good look, and that getting to the bottom of the DeviantArtDramaHub history and analyzing it with word-finding functionality will prove the bits about who has what lingo and who is willing to ask the subject questions wrong.