Usual outcomes of confronting a Non-NA:
1.) You explain it nicely, and they understand. They, however, refuse to leave and now ignore you in particular and continue to plague the game with lag.
2.) You explain it nicely. They get a shitty fucking attitude and trash talk without backing a single thing up and hope to spew more shit from their mouth than you can with facts.
3.) You explain it nicely. They leave. (very rare, happens maybe once every 6000 years when all the planets are aligned, and the blood of 72 virgins is sacrificed.)