If I was dumb enough to get tricked by these idiots I'd at least have the sense to shut up and not tell anyone.
Not bloody likely as you would have to explain the damages and chaos you caused.
I can understand the fun and feeling of superiority when tricking obviously stupid persons into doing obviously stupid things. We all do this now and then with stupid (l)users but most of us draw the line at causing actual damage. As to inflicting emotional stress of the victim, the prankster's mercy usual correlates directly with the character of the victim. If he/she is an asshole they may be required to take a lot more than someone perceived as nice or harmless. Going for total strangers is very low, though. Where's the challenge in that?
Still the prankster should have to face the consequences for the acts they caused to happen. More so if the damage was intentional.
What a rare punishment is avarice to itself! - Aye, with our help sir. A quote from "Volpone - or the Fox." still going strong in theatres after 400 years with a strong theme of Schadenfreude and abuse of stupidity. Schadenfreude goes a long way - especially in the safety of a theatre audience.