If you're the sort of person who naturally doesn't care to upvote stuff that the admins think ought to be booby-trapped, then you won't be stung. Versus, if you

If you're the sort of person who naturally doesn't care to upvote stuff that the admins think ought to be booby-trapped, then you won't be stung. Versus, if you're a jerk who likes dumb comments, you'll be stung often enough to feel inhibition and a need to contemplate a comment's jerkiness and dumbness before hitting the up arrow. This additional mental load is quite deliberate.