User blog comment:DazzlingEmerald/The Hyuga/Ōtsutsuki Bandwagons Are Coming..!/@comment-6003865-20141031232952/@comment-2089817-20141101192612

"Hyuuga's would be the most vulnerable of all ninjas. An Uchiha could look at the backs of their skulls and genjutsu them."

I guess somebody forgot to tell the genius over here that Uchiha genjutsu is all done via visual prowess and requires the victim to lock eyes with them. You should be wary of accusing somebody of not knowing the canon well when you're playing fast and loose with facts.