I saw in one picture they put their "quiet, soldiers healing" sign up against a Prius parked in the corner. Was that there car, or is this another case of them using innocent bystander cars for their nefarious purposes?
I was thinking it might be fun to get some people to drive down early and park cars on the Pinko side with our signs inside the windows. The cars would qualify for hazardous duty pay, although it would be worth a scratched-up car to see a pinko get hauled off for defacing property.
I assume that it was one of their cars this time, but I don't know for sure. You may recall several weeks ago when they fastening numerous signs to someone else's car and had to remove it with the guy, apparently a Walter Reed staffer, complaining stenuously to them.
As for your idea, I'm not sure that the vandals would be caught. If you're voluntering your car as a test case, I'd be happy to see what happens. :)
Seriously though, reciprocity or mutuality is a real consideration here since we are dealing with this people every week. Even if one didn't have principled objections to simply blocking their corner with our vehicles (and I would object to interfering with their expression), and one didn't care about the vehicle (e.g., I'd be happy to risk yours :), suppose we blocked their corner with our vehicles. What do we do when they try that same disreputable tactic on us the following week?