I'm going to super glue my roommate's hair brush to his computer desk while he is away. He comes back tomorrow.
Why do you want to pick on your roommate?
We like pranking each other.
Gluing your roommate's hairbrush to his desk is extreme and wrong. You shouldn't ruin other people's property even if it is just a prank. If you want to prank your roommate then you should do something that doesn't leave any permanent damage.
My roommate will get the message.
I think you're putting yourself in a situation for your roommate to retaliate in a way that might make you upset. This prank is really aggressive and your roommate might up the ante even more and do something that makes you really upset.