They say the difference between a good prank and just being an asshole is if the victim can laugh about it afterwards.
To me, Wikipedia describing this as a "practical joke" and "surreal comedy" in the first sentence, then later going on to describe it as a "psychological experiment [designed to show the] pressure to conform" (which I would describe it as) makes me quite upset.
I don't see how anyone can derive pleasure from making fun of the victim's social ineptitude, desire to fit in, or desire to socialize.
I don't see how the victim could say after the fact "yes, that was a fun prank, I did enjoy this surprise".
This is the sort of "prank" that I would be happy to see delegated to the Social Psychology department at college.