According to the MDC, the biggest problem with our rivers is siltation due to bad land practices. When you add gravel mining, four wheelers, otters, invasive species, cattle and horses, industrial waste, illegal gigging, over harvest, littering, etc. IMO, the jet boats are just another piece of the puzzle that get too much blame. I usually don't take my jet out in the summer because I don't want to interfere with floaters. Heck, I don't even go to the upper end of rivers unless it's flooded. I mainly use it in the winter when it's not practical or safe to go out in a canoe.