Here are some other kinds of posts which irritate me:

1. The person who asks for help, then never comes back to collect it and thank those who helped.

2. The person who asks about origins and is never happy with an answer. Always comes back with "Yes, but was there a version before THAT?" Me, I figure that if we know that a song was published in 1812 (say), that that's old enough.

3. The person who demands to know what supposed secret meaning is buried in a nonsense refrain.

4. A post like this:

Does anybody know the guitar tuning that Algernon Frogg uses for "The Sow beneath the Silo"? (THBTS) I don't mean the well-known tune for THBTS, I mean the other tune.

5. A person who pretends to be knowledgeable about the Irish language, but actually all he can do is sound pompous about getting fadas to show.