The Hapsburgs, a Spanish noble house that held the Spanish throne, made a practice of the inverse of this with uncle-niece marriages to keep power in the house. This was the closest marriage the church would allow. The generations of inbreeding produced the distinct “Hapsburg jaw”. Eventually that led to the poor, ugly, absurdly inbred Charles II of Spain. And remember, those portraits are official portraits that paint him in the best possible light. He died without an heir, ending the Hapsburg monarchy.

The “Anti-Evil Operations” (site-moderation, aka AEO) is very opaque and undermines the autonomy of individual subreddits. In /r/moderatepolitics, we finally just banned discussion of trans issues altogether because AEO had their thumb on the scale. I definitely come down on the pro-trans side, but it’s impossible to talk to someone on the other side of the issue when they have to avoid violating broad and poorly defined rules. The responses from inquiries has been basically non-existent, and this is for a fairly sizeable subreddit (250k subscribers).