They might be dissidents that don't want their internet traffic associated with their physical identity, which makes it quite hard to "buy it themselves" in places where cash isn't used or ID cards are commonly registered.

In which case I don't want their activity associated with my ip.

Dissidenting safely is their problem, not mine.

I agree. If my government ever turns evil, then I'll open my wireless access point.

What jurisdiction are you living in?