A question of the eyes vs. the heart

When I saw this at the drive-in last night, I knew I had to shoot it.  I really wanted to capture the little piece of life in the Midwest.  So I did, with great care not to bother anyone.

But I'm not sure it's ethical to take pictures like that.  They say public events are fair game, but nobody goes to the movies expecting a kid with a Nikon to post their likeness on a blog the next day.

When you look at this with the knowledge that it's a stolen portrait, do you still like it?  Chime in– there's a comments section for a reason.