Well I'm not majorly concerned about the realism I just thought they looked gay, but I think the most unrealistic aspect is that any trained fighter should be smart enough to NOT wear a hood in a fight.
Why? well even in real life I've witnessed some dumbass with a hood over his head, another guy grabs his hood and yanks it down, pulling his head with it, the guy then proceeds to slam uppercuts into his face. But hey, nevermind the fist repeatedly smashing into his face, his head is dry and the wind isn't bothering him!. If you can control someones head, you can effectively control where their body goes, as wherever your head goes, your body follows, hoods in a fight are a bad idea.