i don't see this "kegger protest" as doing much either way.
but chasing GOP'ers out of restaurants hurts the Dems, IMO. the lack of civility upsets people, gets 'em fired up. and those confrontations are hollow victories for the left... at best, you interrupted their dinner? woopee. you let them know you disagree with them? you think they didn't already know that? in my view, they're firing up the right with nothing to show for it.