In general, I agree that announcers add to the confusion/ignorance of basketball rules. However, this weekend I actually heard an announcer get one right...man I wish I could remember his name to give him proper credit.
A PC foul was called on a drive to the hole. Announcer said something along the lines of "Great defensive play. [Player name] had established legal guarding position and is allowed to move backwards to maintain position. It is often confusing to viewers to see that call made because the player is not standing still. That was a great play and a good call."
So there is a least one person working the games on TV that knows at least one rule.
