I have been running Open Source projects for about 15 years, which implies moderating the communities around those projects (in my case, very small communities). I'm familiar with toxic environments. I once sent a very stupid question to the qmail mailing list - it did not go well for me. But I learned a lesson from that beat-down.

I make serious efforts to create an inclusive environment for my projects because that is what Open Source software is all about IMO. Any contribution deserves respect, it's a gift to the project. Maybe the PR needs some work, maybe it's total crap - but it's a gift either way and that should be respected.

It makes me sad to think people feel the need to maintain private repos just to avoid potential conflict with project maintainers because of toxic environments - but I understand that is a reality. I would like to counter that with the fact that not all projects are run that way, and some are very willing to accept contributions.