You must not have manatees up there in "Cawlvert county". There is a
very vocal group around here who would ban all power boats in vast
stretches of water. They will use any kind of junk science that
becomes available. If they ever figure out you can set the threshold
limit value of emissions to zero like we have done with tobacco smoke,
power boats could go the way of asbestos pot holders.
Your problems with manatees and manatee lovers is not "general disdain"
for boats or boaters. We have lots of active boaters up here, and I've
not seen much aimed at curtailing the activities of those who behave
responsibly on the water.