True, but I'd be more concerned about quality than quantity. To me, having millions of users to have a large segment of them wanting to take the country or the site down the crapper is not the way to go.

I was meaning background checks more in terms of specific types of comments/posts. There are decent Patriots out there who are not interested in violence. If you don't have a way to cull out disruptors, agitators, and plants, then you can't have a place for the Patriots since the outsiders would infiltrate and try to frame all Patriots as bad. So if one wanted even a pro-white (not white supremacist, Nazi, white nationalist, or white separatism) space, opponents will try to find a way to bring it down. So if you have a place for even healthy "white pride," it might be wise to find a way to vet them. So if anyone has weapons charges, aggravated assault charges, discon charges without a good explanation, etc., they probably should not be allowed into such a space. And even the other details about crimes would be helpful. If they were charged with disorderly conduct and were a part of some known radical group while charged, I wouldn't want them on my site, and particularly not in places that go against their ideology. And some states have felony disorderly conduct laws that include disrupting burial services, religious services or interfering with reproductive health services, etc. So don't want folks who start anti-gay or race riots at funerals.

I'm still mostly spitballing and thinking.