You are actually the one who strikes me as cold and lacking empathy here, because you don't understand that no one got hurt in any serious manner. You also talk about things that are obvious (why they aren't said), like the sheer joy of the prank.
The reason I continue to argue this point is that I can't seem to grasp the mindset of people who think there's no shame in fucking with people they don't know. Like, how do you square that? Do you like getting fucked with by people you don't know? Is it made better if they thought it was funny?
Does any of that change if you stop thinking about it as a prank and instead consider it as performance art? With art, provocation isn't shameful, it's often a goal.
Typically art is not directed at unsuspecting bystanders and rarely breaks laws that carry potential prison sentences[0]. Even so, I would say that artist understand that they are fucking with people, but they believe that the value of their expression outweighs it. Weather I agree or not would be irrelevant, because they would either explain it as such (artists usually take credit for their work, unlike the Headroom prankster), or decide they were wrong and be embarrassed by it. The latter is offered as an explanation for why no one has come forward and I defend that possibility against naysayers who, for some reason, seem to believe there is no possibility of embarrassment.
[0] notable Banksy works come to mind as counter examples, and I would not not say that they were being a bit of an asshole. Sometimes you may need to be an asshole to make your point though.
