Tbh in these days when it seems any fucker can lob acid on you or slice your throat, I'd think seeing a random person stomping up in a place she's not supposed to be in could cause concern.'
Not sure I'd be too concerned about a woman who's been through airport-style security screening and is clearly wearing a dress which couldn't conceal any weapon. And, in fact, apparently the other 349 guests who were present didn't feel sufficiently concerned to follow Field's example, and they were probably in the best position to judge.
I'm not sure he needed to manhandled her quite so much though but i do think he's have done the same if it was a man.
No, he wouldn't - unless he believed a man to be as little threat as this woman was.