In Australia, for example, the earth pin on a 15A plug is taller than a 10. This lets you plug 10A rated extensions and appliances into a 15A capable socket, but not vice versa.

Amperages above that have dedicated plugs, and any available adaptors only go downwards in amperage limit, not upwards.

This of course doesn’t stop people getting creative with a screwdriver, or from creating immense chains of small gauge extensions, but it certainly goes a long way to reducing risk.