I would put some pictures of people I don't like and offer small rewards if someone succeeds with poisoning them... :bingo:
Or even let other users post their requests and rewards... :hehe:
It's a little risky though... But you shouldn't take it seriously. Make a fun dynamic website and write a good disclaimer in case someone of those people actually do get poisened in real life.
Be creative, there's always a development idea. If you make a well visited website you can monetize or sell it.
My appraisal on domain alone is maybe mid to high $xx. Develop it and you may make a lot more.