You should still never involve emotions into any kind of work or business(this includes school). If you work at a restaurant and someone you dislike comes, would you drug his food? You could easily be in a court case right there and have a tarnished work record.
'Shit better be right, fam'
Do something else besides ruin his grades
Yeah, the guy's a jerk, but you sabotaging his work is the wrong way to go about it.
Teaching yourself how to deal with jerks.
Find a better way, cause this is gonna stay with you.