I've been "kicked off" TD Centre, Commerce Court, Mt. Pleasant Cemetery, BCE Place (but here only when using a tripod) but in all cases I was photographing on what is technically private property, so the only option is to shoot from the sidewalk. I still shoot at TD Centre etc. but move fairly quickly so they don't have time to come out. I've also shot quite a bit at Eaton centre, and have been approached a couple of times by security, but only because they were curious - I was never told I couldn't shoot there - so it's a matter of what policy the property owner has. Also they allow photography in most parts of the ROM.