Common sense applies here:

If you lock it up near a path of egress, such as a staircase railing, I would expect that at a minimum it will end up on the ground and scratched as people would push it out of the way based on principle. I wouldn't be surprised if it had a bent wheel or two either once it hit the ground as people stepped on it. If you lock it up out of the way to a fence, light post or railing, no one will care and it would be fine.

Over here, if you locked if up to a fire hose "dispenser", someone would call the police/fire department and they'd saw the frame and remove it immediately as it poses a threat to occupants of the building. The local authorities definitely would not wait until the fire hose was needed.