Question For All Of You

I work at Sportmart in Canoga Park. Canoga Park is right by Woodland Hills and Encino where a lot of celebrities choose to make their home. This means that a lot of celebrities come into the store. I am not saying huge stars, but Mike Tyson and Arsenio Hall are pretty big to me. You sometimes get celebrities who were once popular 10 years ago. They walk into the store and you look at them because they look familiar to you for some reason but you don't know why. Then, after thinking about it you realize who they are...Anyhoo, In California we are always required to check the customers ID if they pay with any type of card. People in California do not even sign there licenses. They just always expect us to ask for it. So, here is my question....If a not so well known celebrity comes up and you recognize them but you don't really talk about the fact that you recognize them, do you still ask for their ID? Will they be pissed if you don't ask for it? Will they be flattered since you might recognize them? I always wonder these things when I am occassionally checking these people out. What do you think?