Try not taking subreddit history into account when deciding on someone's credibility, for one.
When your whole schtick is that you're a communist, it's not out of character for you to go on a subreddit about communism. It's like I told grimlock the other day, you don't get to be ironic and serious about the same subject at once. You have to pick one or else make it really obvious when you're doing the other one because it's really hard to tell.