What are the best methods of protecting the community from these campaigns?
Reality is you cannot do much about it. I was reading the post of a project owner in an ANN thread how he mentioned that some big whales captured most of their coins in initial launch. So even the people owning the projects could not do anything about this.
However, you can keep yourself away from such projects. You can do so by investing only in top 5 or top 10 coins based on market cap. You can find such lists on sites like coinmarketcap.