My first instinct was: bad idea.

But then when I thought about it is actualy something that has troubled my quite some times.

Lat and longitudes are perfectly fine but in general they are to "simple" for people to use.

When I think of a location in the world I generally think of the country cause I know to some extent where most country's are located.

For example I would to describe some place in Miami I would describe it as in the lower right side of US and continue to work downwards from that.