Or do that.
go back with out bike.remove signs stating no bicycle in court.then just play dumb next time you ride there.since there is no sign saying you can not use bicycle on courts anymore.
what assholes... you should light the nets on fire, take a crap and rub it all over the courts and write in it.... "Now what"
Not to throw in some common sense or anything, but maybe you should approach things with a different attitude.
Technically, if there is a sign, and you're riding anyways, you're trespassing. IE not using the property the way it is legally allowed to be used.
If you're mature about it, approach it professionally, and cite actual facts, you'd probably win.