"Unsuspecting" means not expecting or being aware of something, often used to describe a person who is not prepared for a certain situation or unaware of a hidden motive or danger. Full definition
Look, no dating site, regardless of how well it is created, can weed out the «wolves» who have moved to Internet dating sites to prey on unsuspecting victims. (older-dating.co.uk)
What are your thoughts on this — companies trying to pull the wool over the eyes of unsuspecting public again? (coachcalorie.com)
Nothing beats lurking in the shadows and jumping out on unsuspecting victims. (punkandlizard.com)