Yes I have. I butted heads with them over this a while back. In their defense I probably could have handled myself better, I wasn't using bad language or all caps but few of us are at our best in the midst of an emotional argument.

It was a while ago, I think I called out some feminist bias in a thread (not the Barbie thread from above) and a few of my comments were deleted which I didn't think was called for. When I messaged the mods my concerns weren't addressed and I was stonewalled. When I was unhappy about being stonewalled I was threatened with the banhammer.

It's worth noting I've spent far more time in r/askscience and I have zero complaints there or in any of the other science/engineering subs.

On the plus side I have a better understanding for the complaints creationists and quantum mystics have about dealing with people who study science, which helps in dealing with friends and family.