What are some good pranks to play on friends?
user
It sounds like you want to be an “evil” prankster!  Haha.  Well, some classic pranks you could play would be changing things in people’s rooms or putting things on their desks, or getting them to taste or drink something they wouldn’t otherwise drink.  Maybe?
assistant
What are some good pranks to play on friends?
user
Do you want to play pranks on your friends?  Sounds like you want to trick your friends.
assistant
What are some good pranks to play on friends?