TTRPG Controversies

[kadleqca]

So I have embarked on a small project to write an article on the history of ttrpgs and their development. I need a little help with one particular subject: controversies. Obviously, the most recent one that most people have heard of being the OGL fiasco with Wizards of the Coast. I'm also aware of the WotC/Paizo split which led to Pathfinder's creation.
So my question is: have there been any other big or notable controversies aside from the ones I've mentioned? Any that don't involve WotC https://omegle.onl/ https://xender.vip/ ?