It would be nice if there were some sort of dead man's switch functionality in-case phone access was denied. I'm not sure exactly how this would work, but I think it's an interesting idea.
Perhaps take into account authenticated activity, or lack thereof? Activate this special functionality when you anticipate possible issues (e.g. going through airport security) and you've got a timer waiting on some element from Action Set Y to occur every X minutes before notifying emergency contact(s) Z, specified previously.
Sounds like an idea...