But that would be the subreddit's mod team, not necessarily the Reddit admins. I'm willing to bet those posts will go through on other subreddits. (In fact - I just saw a "fuck spez" on /r/formula1.)
If I had to guess, the mod team is aggressive with removing those kinds of posts because Reddit has been ban-happy and they don't want to give Reddit a reason to remove the sub for "harassment".