The only people defending paraswag are the ones that use it.
Myth: BUSTED.Do I like Parafusion Prankster teams? No. They're annoying, gimmicky, and confoundedly effective. But do I think the entire archetype deserves to be banned? No. If you're going to ban anything, ban the concept of six-Prankster Pokémon teams. Introduce a clause (be it Prankster Clause, Parafusion Clause, whatever) that forbids people from building teams with more than two Pranksters. Two is fine, three or more is not. If you do this, you allow any one of the Pranksters to remain relevant in the meta without giving carte blanche to the annoying all-Prankster teams.
That stated, I'm not even sure if all-Prankster teams ought to be banned. I feel like too much energy is being spent trying to mold the Gen 6 landscape to match the familiar metagame of HGSS (which was what the Gen 5 landscape was likewise molded to match) rather than accepting the Gen 6 landscape for what it really is and could be. I know that I personally don't like the idea of a metagame dominated by Prankster teams. But I also know that I wasn't exactly thrilled with Stealth Rock + Rapid Spin in Gen 4. Gen 4 witnessed kings become paupers and paupers become kings. Maybe that's what Gen 6 would do too if we would only allow it to.
I don't like falling victim to Paraswag. I don't use it myself either (outside of Random Battles where the Pokémon is assigned to me). But I don't think that banning an entire archetype just because people are upset about losing to it is the right way to go -- not when there are so, so many viable solutions either already on excellent teams or else easily added to them. I don't like having to put Stealth Rock on somebody when that slot could've gone to Stone Edge instead, but that's life. I don't like putting Rapid Spin on somebody when that slot could've gone to Psyshock instead, but that's life too. It's the same exact situation with moves like Safeguard: many players are too stubbornly set in their Gen 4 and 5 ways to change their teams' years-old movesets and incorporate a new move that threatens to bump out something else. That frustration should never be justification for banning an entire style of play. Especially not when it promotes an insular metagame that refuses to change with the times and allow yesterday's ugly ducklings to become today's beautiful swans.