That is known as "urban camouflage"
One time I got off work, and forgot to take off my yellow safety work vest. I went straight to an old vaudeville theater tear-down, where the demolition workers were mid-way through stripping out the interior prior to demolition. Eg.: seats all pulled out, fixtures, etc....
My buddies and I were having a great time with crow-bars tearing out drip-grates in the floor to get coins that over 90+ yrs. had gotten lodged in. And tearing up paneling all around the ticket booth and snack stand, finding coins wherever they could roll into and under.
I guess we must've been making quite a racket, because someone from a nearby building called the cops! The next thing we knew, is loud-speakers saying "Come out with your hands up!! We have the place surrounded! We will send in the K9's if you do not immediately surrender!".
We were shaking in our boots as we emerged into the sunlight, with our hands raised. But the moment the cop saw me (with my yellow vest), he lowered his gun and started laughing. Said
"sorry to bother you gentlemen. We didn't know you were still working". He wished us a good day, and told us "there wasn't really any K9's. We just got a call from next door that they thought there was homeless people in there making a ruckus".
At that exact moment it occurred to me that he thought I was a worker. So I just smiled and told "that's fine officer. We know you're just doing your job". Then we went back in and continued our job