Who sign up, don't even try to use search, and then either thread hijack or start numerous new threads asking SFQ's about things which a simple browse around the forum, or even Google would tell them.....
And then bump the thread after 25mins (!!) because they've not had someone rush to their assistance, or become indignant when they get short replies.
And then when they do get their answer can't be arsed to either say thank you or hit the thanks button.
Sort it out, its basic manners which seem sadly lacking.