Ooh, I have seen one, and I am ashamed to say, I did "nothing"!!
I was sitting with my Hubby and kiddos on the train platform for the special seating for the parade. This was actually embarrasing for my husband, as it drew way to much attention to us. Actually the people that had the Mickey's came up to us and asked us how we had gotten that spot. I told them the story about how I had taken my boys for a tour that morning, but had somehow gotten the time wrong in my head and showed up 15 minutes too late, instead of 15 minutes early. I had burst into tears and ended up spewing my entire pack of trip woes to the poor guy at the tour gazebo, how my son had the flu, and how my hubby was at the ER for his ear and had also twisted his ankle, and now this! My boys did not know what to do, so stood there rubbing my back and telling me it was okay, they didn't want to go on a tour anyhow. The tour guide, Jamie, directed me to a private bench so I could compose my self. He went and rang up a refund for me, brought my boys pins from the tour that we had missed, brought us some special fast passes, and then had a big talk with my boys about how to "discover" the magic of
Disneyland without a tour guide. It actually turned out to be an amazing experience. Then, when we were leaving, he said, just a minute, I want to do one more thing for you, and he went and got us the preferred seating. It was absolutely a magic moment. Oh gosh, just remembering that moment has made me so homesick for DL!
Anyhow, the people with the Mickey went and spoke to the CM. Then I saw that the elderly folks in their group were allowed to join us on the benches, and the younger (40-50) gal stood at the top of the stairs. And that was when I spotted the mickey head. So, in my defense, I would have had to push my way through a slew of people to say hello, which would have been even more embarrassing to my hubby.