It depends, too, on the forum "culture" the poster is used to. I used to frequent a software support forum that made necro-posting almost mandatory. If you started a new thread, you were guaranteed to get one or more replies to "USE THE SEARCH STOOPID NOOB, a thread was posted on this subject 4 years ago for cryin' out loud!"
I would love to name names and point fingers, but I still use the product and might need their help again someday.
