What are the best methods of protecting the community from these campaigns?
You should start with yourself. Do not participate in pump and dump and if you know someone participating in it then advise them to avoid it because they will just lose in the long run. There are some who opt to create their own channel and recruit new members to join their channel because they know that they will end up losing if they were just a member. They have to be the admin to actually profit from this scheme.
It will be good only if we analyze by ourselves such projects, I do not think that there ever will be something that can protect us from this fraud. I think it is impossible to take those pump and dump campaigns away.
It would be better if we trade on our own and not depend on someone to trade. More often than not when someone advise you to buy something then they probably just want to pump their coin. Besides that, people will only realize their mistake in joining pump and dump groups when they are burn.