I don't know, but one of the most consistent patterns I've seen with chud posters, the kind that have just about zero post history in a place they get chuddy in until they post their chuddery, is tons and tons of nfl/nba or team specific fansubs.
My hypothesis is "social engineers" and freelance chuds build up karma points by nodding along in sports subs then go to /r/antiwork or /r/fuckcars to do one off bootlicking posts. It's weird but otherwise I don't understand the pattern.
I've said it before and I'll say it again but /r/hockey is surprisingly acceptable in their politics. Can't speak to /r/nfl or /r/nba though.
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/r/baseball is good as well, very pro-labor.