What are the best methods of protecting the community from these campaigns?
Since pump and dumps are prohibited by law, regulation could make an end to these endless pump and dumps. I dont think it will be something governments focus on first though, as they want to take part of the cake themselves first before focusing on anything else
Are you really asking for government regulation? Have you understood even a single word of the concept of decentralisation? Have you heard about a man called Satoshi?
You'd better keep to your regulated fiat money. That'll make the world a better place.