A few years ago I had a commission to illustrate a bank building in Omaha for the home office of the bank to be used in a newspaper ad.
I was at the location taking reference photos.
I spent some time explaining my presence to the police, notified by the branch manager.
I'm 6' 5" , 230 lbs with a beard and I don't usually dress for success.
I supose I looked suspicious.
I've since become a bit more clandestine. paranoid and better dressed on location.