I wonder if some sort of “Dead Man’s Switch” might be an appropriate solution for something like this? IIRC there are services that will send out messages to certain people if you don’t log in for a set amount of time, so maybe something like that could be set up to email friends/family/a lawyer/the consulate of your home country or whoever in case you get snatched?
It probably won’t be able to tell them where you are or what exactly happened obviously, but it could at least let people know something’s up.
I have a disaster recovery plan, but part of my disaster recovery plan involves not posting the details of my disaster recovery plan on the internet.