If you have and can show prior-use, you can't really "get in trouble". But they could still raise a stink and bully you into giving up your domain name.
If the domain is important to you, consult with an attorney. It's worth it.
Jim
So...does the Trademark they own in their country prevent us from Trademarking the same name in our country? If they own the Trademark on "greasypizzadrippings" in Country X can we register "greasypizzadrippings" in our foreign country and then sell our "greasypizzadrippings" on our "greasypizzadrippings.com" website or do we have to sell anything but greasypizzadrippings on our website of that name?
TIA
:)