Local cops via MLAT wherever I am working, as I owe US taxes regardless of where I earn money, a fun misfortune based on my location of birth.

Failing that, local cops, when I am working nowhere and have to resort to stealing food to survive.

Starvation, death by exposure, death from preventable disease and the like might not literally be guns, but the effects aren't that dissimilar and they are all consequences of not working in the US. There's not exactly a robust social safety net here.

I think people overstate the dangers of moving to Canada