> how would you train an elderly relative you left in your backward homeland with all this trade-craft
An elderly relative probably knows/knows of various people who've been caught and punished for this sort of thing. Tends to motivate people to learn. Old people aren't stupid.
Right, our "dumb elders" here are people who feel that they've made it and that they don't (or shouldn't!) need to learn anymore. Plus being able to make you child or grandchild fix your computer might not be a bug, but rather a feature!
An elderly relative probably knows/knows of various people who've been caught and punished for this sort of thing. Tends to motivate people to learn. Old people aren't stupid.