Airmanship isn't about rights it's about responsiblity and good manners. If you fly a powered aircraft it's only good manners to avoid parachuting sites and gliding sites, quite apart from it being a good deal safer!
Of course if you lot fitted transponders those of us with TCAS could see you and those of us without might expect ATC to see you.
I know, I know you either cant be bothered, they are too expensive, or they are too heavy.
.. .. but it is the responsible thing to do.
Oops well over dun my quota of smilies now.