Sometimes is pretty obvious that you did no work.
It is most likely from students that want us to do their homework.
Or employees that have no interest in the subject and have been asked to do some research by their manager.
You can almost imagine the following scenario, just by reading the post.
Manager - "Go find out how to do X with JBoss"
Employee - Post to forums "How do I do X with JBoss?"
Employee - Makes a cup of coffee and talks idly with a collegue
JBoss Forums - Ignores the post
Employee - Why no answer?
Employee - Tells manager, JBoss does not support it.