I never cease to be amazed. This kind of thing is allowed to remain in so many city or county properties, sometimes in the most stringently enforced jurisdictions.
If you tried this in front of a private store on a public street, they'd be all over you.
Do as they say, not as they do.
(I'm sure Joe hasn't forgotten his "tour" of the LA Convention Center a couple of years ago, and all the "permanently temporary" wiring that abounded.)