[throwaway946513]

> living under the identity of someone else

Quite sure most people, the vast majority of people would rather this be tightened up just for the fact that they don't want to have others living under their identity.

As for brothers sharing a passport, I doubt that these laws would affect them the same way, especially if they're twins and pass for each other. But then, just because they can do so, doesn't mean that they should.