It can be anyone! You will (probably) not be shamed for who you pick!
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Whoever invented homework. (while on the subject, once someone from my school created a hitlist google docs, and shared it with the entire grade... we were in grade 6.)
One of my ex boyfriends. He was abusive and eventually landed in jail ,because he kicked his new gf in a coma. The world would be better without him.
I would probably kill my middle school tormentor. Oh, there was also this literal psyco that I met on a Minecraft server he was a hacker and basically ruined everything for no reason. Yeah, the world would be better off without both of them
A 10 year project and probably not do-able..but I would kill the couple that put their 6 months old baby into boiling water....for just crying..
On a more personal note...who-ever hurt my children and/or greyhounds