A stupid and unpleasant prank played purely for the amusement of the Prankster is one thing, and might elicit a fair quantity of rightful hostility toward the Jolly Japester, but in this case the "prank" was aimed at manipulating people, and at manipulating a debate. A prank from which the prankster wishes to benefit in some way, the equivalent of the person shouting "fire!" in the theatre and then going round robbing people's bags after they've run screaming out the fire exits in panic, is of a totally different character.
The latter kind of prank is not just for kicks, it's about malice and manipulation.
Do I think it deserves a perma-ban? In light of what JF says about the negotiability of a perma-ban and that they can in any case be commuted to a temp-ban on appeal it seems fair that Spiker067 should be required to apologise for his actions and perhaps explain himself and make some case for why anyone should trust him again before he can be allowed to rejoin the site.