Someone or some people are posting comments, sometimes many in the same thread that are just full of gibberish. One I saw was just the word "cats" over and over again. Others have random letters that don't mean anything. Some have long spaces in them. Sometimes there is a short, usually obscene and completely non-topical statement surrounded by gibberish. They're everywhere, I've reported some of them, but it doesn't seem like much is being done about them.