(1) Threads consisting of nothing more than kvetching,
(2) Posts consisting of nothing more than something like the word: “Agreed”, or “I agree”,
(3) What I already mentioned: illiteracy. Every fool, every drunk in the gutter has an opinion. And every other fool is convinced that the world is anxious to experience the vomit of his ungrammatically expressed opinion. (1) You yourself are quite the kvetcher!
(2) Uh-oh. I see someone didn't read his grammar lesson.
(3) Oh, the irony!