Warnings 2

Some of the warnings seem unnecessary in the US but maybe useless in Taiwan.
This one says no parking on the sidewalks, but as I took the picture, a car parked behind me. What's a business to do? Scold the paying customer?

When you go to the parks there are lots of rules.

I  like the more individual warnings, like drugs are bad:

Or bribing officials(policemen) is bad.

And in a hospital elevator it's good to watch out for pickpockets.

And here on a wall someone(with probably a bad experience) says watch out for thieves.