Sure, given that on any given day you are on camera several times every day and many times you don't even know your being filmed, banks, traffic camera, CCV, police etc as long as it's in public.
So what is the problem with people walking around with a camera? Is it that you might be seen doing something you don't want others to see? Then odds are you shouldn't be doing it in public. BTW where I work I'm on camera almost all day so go ahead film away.