Just a theory mind you, but when I make a meme with what might be an "objectionable" word or string of words, I make it, save a copy, immediately delete the first one, and upload the saved one.
Seems that way the verbiage doesn't show up in the Image Creator Description, so if indeed there is an algorithm designed to detect such horrors, it wouldn't automatically flag the words. They would have to actually read the meme itself. And judging by the # of mis classified memes I see posted, I don't think that happens all the time.
Of course there is always the Lib Narcs on here that their life's work is to unnecessarily report, but that might save you from just the mods.