There really are not. I think it's hard for "non-heretics" to understand just how tight of a fist most online forums keep.
I invite you to try it! Pick a few heretical statements like "Islamic migration has been a disaster for Europe" or "It seems like this trans thing is socially contagious for young girls" and post them in relevant threads on the top 50 Reddit subs.
You will get immediately banned from 95% of these subs, and might last 2 weeks or so in the remaining 5%.
I invite you to try it! Pick a few heretical statements like "Islamic migration has been a disaster for Europe" or "It seems like this trans thing is socially contagious for young girls" and post them in relevant threads on the top 50 Reddit subs.
You will get immediately banned from 95% of these subs, and might last 2 weeks or so in the remaining 5%.