would it be possible to warn non-US users that you service is limited to one single country? you know where someone is connecting from, so the sign up form cou

would it be possible to warn non-US users that you service is limited to one single country? you know where someone is connecting from, so the sign up form could be a little intelligent and say 'hey, this service is most likely useless for you'. a .com address does not help the international audience to determine if your service is global or limited to a single country.