Only shot I was allowed of the well head

Well, this is the only shot I was allowed to take after entering the site and being approached by the manager and another man. They were visibly concerned about why I might be taking the photos and I was asked to sign some kind of sign-in/insurance log sheet for entering the site without the proper safety equipment. LET IT BE PUBLICLY KNOWN that there are no signs that said I couldn't be there (posted, no trespassing, do not enter, entering hard hat area, etc - NONE OF THESE).