I did see that - they must think people have been cheating the system. I know there's facial recognition software that Disney utilizes on the cruise ships so maybe it's something like that.
I hope there isn't a back-up for people receiving their C2C medal 1 month from today (!!!!).
I don't think that's a flame-worthy question.
For me, I'll be wearing mine to the after-party and then all day the day after the race (Sunday). Monday maybe, not sure sure. Definitely wear it though, if you want to - in 2011 I did the Princess Half with my brother and I wore the medal afterward...he didn't (just didn't realize that people did that) and regretted it. The next year after we did the marathon he didn't take the medal off for the rest of the weekend.
I'm not sure whether I'll wear it to the airport but either way I won't check it because (sadly) I've heard of people getting their medals stolen out of their luggage!
So for me, once the trip is over I won't wear it anymore and it'll go up on the wall with my other medals.