My opinion has morphed over time from "hell no" to simply that each MUP user should follow the same prescribed rules set.
Meaning, stay right, pay attention, don't speed, etc......... Nothing to say that a runner with headphones occupying the dead middle of a trail also isn't a hazard. Or a fully human powered triathlon bike whizzing along at an inappropriate speed.
So, I'm all good with most of it if folks follow rules.
Issue is, folks don't follow rules. Then what you end up with is rules banning e-bikes, banning bikes and only walkers/on foot traffic, etc........
Around here starting to see a lot of the $1000 "mutant e-bike dirtbike" contraptions you see advertised on Facebook that are more like electric motorcycles. Then folks use it as a legal workaround for not using a gas powered device on a greenway and not having to legally register the motorized device for road use.