Beta Males, AFC, Other Guys Question

So there are a lot of tatics and techniques on how to deal with AMOGs, but I have not found anything about on how to deal with AFCs or other guys. I'm not talking about drunk guys or guys who actually approach, but guys who do nothing or as HBSharon, SHBBartender, and SHBSwimmer put it bar stalkers.

These are guys that basic stand around and stare at a woman, yet do nothing. HBSharon says the majority of the time, she'll never see the guy again, but that there are two that she sees constantly and it is always the same just staring. SHBBartender has multiple, but that kind of how she makes her money, guys go to her bar try to hit her, get drunk and stare at her. SHBSwimmer point one out to me on Saturday, who was just standing to the side of her staring; he went away to another part of the bar but continue to stare and not once attempted to speak with her.

I am not trying to belittle HBSharon, SHBBartender, and SHBSwimmer feelings or fear and it is kind of strange. But what do they do? Keep ignoring them? Try to befriend them?

What do I do? They don't want these guys around, so I can't try to incorporate them in a conversation. These guys are not technically doing anything so it would be kind of weird to get too aggressive with them. Or maybe I'm just being too nice about the situation.

Any ideas???