How about a black t-shirt with the word "sociopath" on the chest in white, with a font similar to this tweet from M.E.?
I'd wear it for shits and giggles.
by Demiurge
by AlteregoCome on, Slimy balls! Don't you have anything more clever to say than "your daddy wishes you were a boy so he hates you?" LOL. Regale us with more of your piercing psychoanalysis. It's really quite entertaining. :)
oh cool another female spewing emotional bullshit
how big is your tits can i see plzz i'm the bewb inspector
WOW! You guys really hate women, don't you?
by Secret Agent SmileyNot everything is based on looks you know, falter. It's the t-shirt, and at her age she is acting like a pathetic psycho fangirl.
I know with you being hypersensitive from psycho daddies critism, that you miss the finer details such as this but with him not being diagnosed, isn't it just likely that he was an angry little prick with a failure of a daughter instead? Isn't it true he wishes you were a boy and that's the real reason he hates you so much? :'(
If calling him a psychopath makes it easier for you falter, I'm down with that hugs :D
Oh, Slimeballs! You act so different and non-conformist, being a sociopath and all, and you really are incredibly bourgeois, judging people by how they are supposed to act at a certain age. I suppose I should be like Grandma Moses or something and just sit in my rocking chair on the front porch, collecting dust. Ain't my style, Baby. I have never fit in or conformed and I never will. Just what is the point of being on a Sociopath World Forum if you are just going to act like a proper little burger. You might as well have a conscience! 
To think this thread started out with Luna looking for ideas of what to merchandise. And I was not even the first one to mention t-shirts. I just wanted to show how t-shirts sell.