i agree, that places were you can and can not park require proper signageThe private property act based tickets are something like "parking a vehicle on private property without consent", that makes it a multi purpose type ticket unlike "expired meter" or "invalid sticker" which are very specific tickets.
The site has to be certified in order to enforce parking regulations, most likely those spots will be labelled, signed, or otherwise not enforced. If you get a ticket challenge it if there were no signs.
I personally won't park on the shaded areas/spots.
however, they don't need a sign to say motorcycles can't park on sidewalks or in a manner that would prohibit pedestrian traffic
In Brampton this is a big *** ticket item: ACCESS AISLES
those striped lines on the pavement in Brampton have set fines of $300.00 payable to the City
however, an access aisle also constitutes walkways, so anything that would interfere with the movement of people, especially with disabilities would result in that $300.00 fine
this is an example of someone getting an obstruct access aisle ticket; all they needed to do was touch the yellow line