Anti-vaxxers on the promenade yesterday

Right outside crown, carrying bamboo sticks with A4 pages of absolute drivel on them and hundreds of the same sticks stuck in the ground.

I read one and laughed at the ridiculousness of the content and was verbally abused by about 5 of the anti-vaxxers. I was with a group of friends and my 85yo grandma and we were screamed and sworn at and followed for about 15m down the promenade while they hurled abused at us. Because I laughed.

Did anyone else have similar experiences with them!? What are they even trying to achieve?