Oops -- did they block traffic? If so, that wouldn't be very persuasive at all. One must pick one's spots and not "get into the face" of our neighbors --also be aware of the impact upon young children.
Yeah they did -- not the street traffic but the pedestrian traffic. That bridge is kind of a pedestrian bottleneck for the tens of thousands who commute daily through NW Station. They were blocking the sidewalk, delaying commuters, and were in-your-face (with the graphics) rather than passive demonstrators. Spouse said it was somewhat akin to running the gauntlet.
I would defy them to produce a single soul whose mind was changed to their favor that day.