the complaints about palhares weren't that he held on after the tap. it was that he held on after the ref already dove in.
when you're holding a sub, the literally only thing you're waiting for is the opponent tapping. you know when it happens, you can let go almost instantly. i have absolutely no beef with guys holding on to stuff until the ref waves the fight off, or touches them. but when that happens, you let go. not 2 seconds later, not one, not half. you let go immediately. in some cases, the ref had to tug on palhares for like 2 seconds before the fucker let go.
there is no excuse for his shenanigans. he's either dirty and shouldn't be allowed to fight, or he doesn't have the mental capacities to let go when he's supposed to... in which case he shouldn't be allowed to fight, either.