Really, I only find them leaking into certain subs, but then again, I'm mostly subscribed to smaller ones. /r/news, /r/libertarian, and /r/TIL seem to have a decent number of /r/coontown subscribers in my experience. And that's really not too surprising if you think about it. But yeah, Hubski has been much better on these fronts. I've encountered a lot less reactionary bs here. Few people in fear of some "SJW menace."
The people that talk like this have driven me further and further from reddit. The site seems to have become a full fledged hatebox in every single subreddit. I'm browsing /r/GuildWar2 and I'll see people whining about SJWs. I'm in /r/books I'll see vaguely racist nonsense and anyone who calls it out gets downvoted and called a SJW. It seems it's become impossible to engage with people on reddit and be a decent human being at the same time. That's probably hyperbolic of me but it feels that way to me and it's had a chilling effect on my posting there. Half the time I can't even bring myself to click through to the comments because I know there will be hatred and gnashing of teeth even if it's a picture of a kitten stuck in a sandal. I guess I'm glad I have hubski. The majority of people here seem to have a level head and don't seem to be interested in polarizing language and vitriolic rhetoric. I worry that reddit influxes will ruin the community here too though."SJW menace."
I think /r/videos could be added to that list as well. Every time that there's a post with a non-white person in it, they come out of the woodwork to spout their hate and back it up with "facts" (usually stormfront copypastas). They also lean heavily towards /r/theredpill and the ilk, because they get really happy when a woman gets "what she deserves."