security guards on patrol warning text sign, , black, white, large detailed signage closeup

activity alert area arrest authorized being black cctv closeup customisable danger detailed deter detering 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 signage signs subject surveillance text theft trespasser trespassers trespassing triangle unauthorised under unwanted video warning watch watched white yellow zone