In western Canada there are many national parks which do not allow you to ride jetskis. the only thing that makes it acceptable is thats its a ban on all "motorized" activity in the interst of keeping the park prestine ie no boats, no fishing boats with little kickers, nothing...paddle or swim thats it. same goes for dirt bikes or atv's. in that regards it makes it easier to follow said rule as it applies to all users equally and is genuinly in the interest of conserving a corner of nature.. that being said i am also an avid mtn biker and they closed all the popular trails to bikers claiming we erode the soil yet they let all the horseback riders trample and
all over the trail because horse are "natural"...ya tell that to the family hiking behind the horses avoiding massive mud holes or crap..lol
on the plus side if there is a lake with a designated boat access its not restricted and can be used by pwc's, they do at times have areas they would like you keeping out of ie no boats beyond point xyz or such and such known terrain feature, most times in the interest of salmon spawning inlet or some such thing.
i do have to agree with you all down south in regards to the discrimination taking place..a huge majority of boat outboard motors are all two strokes polluting as much if not more, and what of the cigarette type boats with twin v8 454's and straight pipes throwing everything out back into the water..ya that doesnt pollute at all..
ultimately we are a "minority" group and trampling your right to ride as a much smaller backlash hence they start there..
the national park thing im use to and can work around given how much damn water we have here, that being said when all the other "non park" lakes start seeing such regulations...well....lets just hope it doesnt come to that