and am somewhat suprised to learn thst racism is rampant on a subreddit so mainatream and "public" seeming.

You must be white.

(and I don't mean that ironically, I mean that if you think being "mainstream" and "public" means that those kinds of things won't be found there, you must either be new to the internet or white. If that makes sense. It's like that time that guy said "imagine if this attack had happened to black people, the media would throw a storm" in relation to those black people who attacked that mentally disabled white kid, and pretty much every person of color was like "uhhh...you mean, like last month when the exact same thing happened to a mentally disabled black kid and the media said nothing?". Some people's perspectives are on totally different wavelengths because of where they are standing at the viewing station.)