PWC's are banned in the shores of Dubai (thank god), it was getting out of hand a few months ago where rental jetski's were off the shores of Jumerah.. the Government banned them (think it had to do with some morons getting hurt, AL Mumzar shores were their favorit spot (then got banned as well) and a month ago you could buy anyone of them hope they dont ever get sold.. A new law is being made were Jetski's off Jumerah will be allowed ONLY if it was regesterd with the Police maybe get a number plate or something you can report them.
I honestly still untill this day do not see the joy of those jetski's