Watch out Suedehead - from what I am reading here your card will definitely have been marked by GMP - for encouraging pitch invaders. Make sure you keep glancing over your shoulder at games and check your car for tracking devices. Personally I would prefer to scrap any discreet monitoring. Better to administer a spot of summary justice. A good horse whipping in the ground control office for offenders would do the trick. I doubt that the fence jumpers and pitch runners will be hero worshipping you after that.