Let me be more clear. I think most people do NOT fantasize about the actor/actress. I think they escape/fantasize into the story, kind of like 'dreams' and 'day dreams'.
Entertainment is NOT a bad thing.
If all you look for is the negative aspect in something, then that is all that you will find.
I guess it would be like people that had fantasys that there family could be like the Beav, or Father Knows Best or the Brady's back in the day...
Make believe is fun as long as it does not consume your reality...