Oh, FWIW, I personally won't be making ICE numbers. I think it's pretty obvious from my phone that they should call Home, or Mum or Dad, and I think the risk of encouraging crank calls to ICE numbers is much higher than the risk of me being incapacitated and killed in circumstances where the ICE number would be useful.

But that's my assessment and I won't be critical of those that weigh the odds up differently.