I think a gym that tried to intimidate an athelete into staying or removed an athlete right before world's over a rumor that they were switching after the end of the season would deserve a much worse spot in hell than parents who tried to recruit others to leave.
If I change from one cell phone provider to another, is it wrong for me to tell my friends about the good deal that I got w/ the new provider or how much better their service is? Why is AS cheer any different? The best defense against your competition is having a great product - if you're that scared that others will leave just by finding out about an alternative, you really must not be keeping your customers happy.