Totally common... My competitors use my name and trademarks in their search terms. It's shit but legal. The more successful I am the more I drag them up with me.
They can't use your name on their ads though. Google will boot that when you complain... but you have to Police it. Yahoo, Google they all work the same. You gotta catch the scum and turn them in.
RIDERS - Just a bunch of guys that wanna go riding !