I've seen way more "shady" creatures at the public ranges
Remember that between the waiver, the arrests and all the cameras in a COMMERCIAL facility that is mangaed and manned, primarily the wanna bees are the only ones left as those that require annonymity do not like the scutiny.
I've personally seen groups come in with a patsy who has the "token" PAL and the rest were his guests, so having a license is not a guarantee in the least.
Also remember, a PAL is only resfused if violence is suspected, not simply stupidity or criminal behaviour.
my 2 cents.