Thats are pretty good rule of thumb... anyone not willling to commit more than 3 posts before enlightening everyone is usually has issues. Most people spend a little time learning something before they teach everyone else. Or are they on a mission to spread the Gospel throughout the internet with their new found knowledge?...... whats the motivation? Until someone with a track record comments, its not even worthy of consideration any more than someone you don't know walking up to you in the streets to tell you your mother is fooling around.