Flat earthers may only be a problem of themselves, but climate denialists, anti-vaxxers, and creationists are not. (Creationists are constantly fighting to have theology taught as science, and even today biology textbooks isolate and underplay evolution to avoid offending them.)
As you say, they all respond to attempts to restrict their falsehoods play into the paranoid narrative. But sunlight doesn't disinfect it, either. They've set themselves a very attractive head-I-win-tails-you lose scenario, making them impossible to stamp out or even mitigate the damage.
As you say, they all respond to attempts to restrict their falsehoods play into the paranoid narrative. But sunlight doesn't disinfect it, either. They've set themselves a very attractive head-I-win-tails-you lose scenario, making them impossible to stamp out or even mitigate the damage.