Good to look at analogies. That is how we learn and see patterns. Not sure that one fits though. An electric guitar in a bird watching club is completely off topic. The same would apply here. Posts have to be on topic. Perhaps a better analogy would be a guy who came to the bird watching club and continually stated that looking at small birds was stupid and all the good, large birds had left. Now imagine a bunch of his friends said that too. A group of them doing nothing but moaning that we should all go home now. That would be annoying, but still arguably on topic.

How would you deal with that situation? Do you ban them from the club for having an annoying opinion that differs from yours? Or do you develop techniques to ignore them? Such as moving to a different area of the field where you can watch the birds in peace. I don't disagree people can be very annoying. Especially ones who seem to hold very different opinions, or shills voicing truly different opinions. But banning is an extreme form of enforcing order. There are other options that don't involve such draconian actions that need to be considered.