I've been trying to think about how to make this suggestion without seeming to trivialize the issues involved. My general view is that mockery is an underutilized tool by The Left, though we've gotten a bit better at that in recent years. We really should be pointing and laughing more, and one reason we haven't is the fear of alienating voters that aren't going to vote for "us" anyway.
I do tend to think that there are legitimate first amendment issues associated with abortion clinic "buffer zones," though the fact that such judicial first amendment concerns are limited to abortion clinic buffer zones highlights that such concerns are ultimately bullshit (apply concept broadly, or not at all).
Anyway, what I'm getting at is... maybe counter-protesting should bring on the funny. "This guy has a tiny penis -->" t-shirts. Gay men's a capella choirs serenading them. That sort of thing.
The point is that comedy is a good tool, and what a typical anti-abortion protester nut hates most is the idea that his authoritah is being undermined. Point and laugh and they might just scamper away.
Obviously the problem is turning these spaces into bigger circuses than they already are. I don't want to do that. There are women trying to get needed medical care who don't need any of this shit, from the left or the right.
Still...they hate to be laughed at.