Trucks are also a means of mobility. Why would a no motorcycles sign be any greater an infringement on "mobility rights" than a mo trucks signs?
Also, mobility rights are a federal Charter of Rights thing and applicable to Quebec (where the OP mentioned "No Motorcycles" signs) as well. Still the signs appear and they are perfectly legal.
Mobility rights in the Charter have nothing to do with mode of transport. Mobility rights merely mean that you are free to live/work/travel where you wish. You still have to abide by local/provicial/federal regulations and laws in doing so.
What they will do depends on what turns out to be most effective and workable.
- In some places in Quebec, local authorities have chosen "No Motorcycles" restrictions on certain streets and roads. Riders moan and whine about it and refuse to understand how they as a collective group are in good part responsible for that state of affairs.
- Here in Ontario and out west in Edmonton, local authorities have decided to pass local bylaws restricting DB levels, and imposing roadside testing and fines to back up those bylaws. And predictably, riders moan and whine about it and refuse to understand how they as a collective group are in good part responsible for that state of affairs.
Hopefully the bylaw approach used by Caledon will work effectively enough to reduce the noise problems posed by motorcycles and hopefully the loud-pipes contingent will finally sit up and take notice of where things are going. Otherwise, the next thing could well be Quebec-style "No Motorcycles" signs on some of the popular riding roads with high residential concentrations.