This makes me curious about the following scenario:

If you break a US internet law while living in another country (in which that law may not exist), are you still liable for it when you return to the US?

For example, say one travels to Mexico, "annoys" a bunch of people (especially ones living in the US), then returns to the US. Can he be arrested/prosecuted?

I've always found the boundaries of law fascinating when dealing with boundary-less entities, such as the internet and space...