That's the exact same circumstances that lead to the development of guerilla warfare. I don't know how you'd go around creating a "highly visible gimmick" that has any lasting impact though.
The point is to simply demonstrate mass support by any means available. You can do it by gathering as a large crowd, but when that becomes a vulnerability your tactics must evolve somehow.
Dunno, ask Tesla owners how they're feeling about driving their vehicle and parking it, lately. On that note, ask Musk how he feels about the trending direction of his stock value. The highly visible gimmick of swastikas spraypainted on cars, torched charging stations & Cybertrucks, etc. seems to have an effect. Probably a lasting one, though that remains to be seen of course.