managing chapter membership expulsions is not the job of rank and file members.

Motioning for it is.

i don’t think it’s unreasonable (even with my low opinion of them now) to expect them to be able to act quickly and decisively on people showing up to events to creep on and harass people

What authority do you think these people have that you don't? Who is supposed to be the bouncer when you're at an open-door volunteer event organized and hosted by volunteers for the purpose of increasing volunteer activity?

are you suggesting that cornering women and asking them whether they are wearing a bra is “eye-contact between members”?

I'm suggesting that the guy who posted a "Please come to my DSA meeting" flyer on a street light pole is not your personal bodyguard.