security guards on patrol warning sign, blank black yellow copy space, large detailed vertical closeup

activity alert area arrest authorized being black blank cctv closeup copy customisable danger detailed deter detering empty enter face facilities facility fines guard guards hour human isolated large man not note notice only other patrol person personnel persons profile property prosecuted protected recorded restricted security sign signs space subject surveillance text theft trespasser trespassers trespassing triangle unauthorised under unwanted vertical video warning watch watched white yellow zone