Where I live no one cares if you ride class 3 on the bike path UNLESS you go too fast. Folks will definitely call the police if you are speeding and making it unsafe for walkers, kids, and slower riders. And, yes, the police do come and ticket.
I personally get a mental "twitch" when I see things that are designed to look like motorcycles instead of bicycles zipping down the bike path, but I smack my knee jerk reaction down unless they are speeding in an unsafe manner. Most of the time
it's older guys on fat tire moto-bicycles but there are a couple of fellas who ride what are clearly motorcycles with pedals instead of pegs and go 30 mph and I know they will eventually get caught. The real problem to me is that it gives the rest of
the courteous e-bike riders a bad reputation. People take one instance and spin it out until suddenly you have a movement to ban e-bikes :-(.