I'm a little freaked about strangers knowing my kids' names anyways, so the number seemed like a good idea?
There is no one telling us to put a NAME in the MB. You can put whatever you want. I've put "5k redo" or "Half!" and "keepcalm" with the other from my split stay saying "carryon", and things like that
I always imagine the WORST possible scenario!
Then it behooves you to familiarize yourself with the actual methods Disney uses. They do not generally take a MB off and call a number. They do not usually look at tattooes or bracelets or sharpie on the forehead and call a number.
What they DO when they become aware of a lost parent (whether the parent has noticed they are lost or the child has noticed the parent is lost) is mobilize in their own ways.
As a parent, take a picture of your kids every morning, in a way you can EASILY retrieve. On your smartphone or in your digital camera but know how to find that picture. Instead of describing the child, you have a picture.
Help your kids know what to do. STay in the same basic place; don't run all over everywhere. Find a Cast Member, and here is what they look like in the various areas. Better, find a Cast Member at a cash register to show them, "here is what a cash register looks like, can YOU find a cash register and a cast member here?"
Make sure the kids know your NAMES! I'm biased because I called my mom by name and my son did until he decided to be "normal" and call me by my title, but it really bothers me when kids think their parents' names are mom and dad. Everyone has a name, and people in a family should KNOW THE NAMES.
If the kids can't find a CAst Member, have them find a woman with children that the child feels s/he can trust. Go to the mom and ask for help. (yes dads are awesome, yes no-kid people are awesome...this is coming from the excellent book The Gift of Fear*, that intuitively kids will choose a safe person to go to, and the statistics that show clearly that the safest person for someone to go to is a female who has children) Hopefully that mom will alert a Cast Member and not go rogue, trying to find the parents on their own.
Once the CMs are mobilized, reunion will likely happen soon.
Please have one parent NOT panic. The other parent can do what they like. But have ONE adult try to stay calm. The CMs do this allllll the time. They are the experts. We are not.
Know that ultimately reunion might happen at the Lost Child center (might be called Lost Parent), so you could send one parent there while the other parent stays with a CM if that's what the CM is asking them to do.
Know the Disney protocols!
*If you have not read The Gift of Fear, it is EXCELLENT. As another person with a huge imagination (and always the negative stuff; I have never once imagined winning the lottery and being happy forever), that book was incredibly good to read. Gavin deBecker is the author.