Landmines as teemarkers. If your avatar steps on one it explodes and you have to start your WGT career new as a hack with starter equipment cause all your clubs, balls (yes, ALL balls), xp points and credits have gone.
Or a cash register as teemarker that jingles every time when a player hits the ball, jingles two times if he has bought a cc-pass to play the round, and jingles three times if the player is a member of the Gregorian CC.