I'd say it's a great idea to leave it as an option. Some may want to segment others may not but what it boils down to is the person willing to make the duel and set a time, date, and be on time. I've had some of my best duels dueling european players and for some reason their better don't ask me why I'm from Tennessee. (must be in the water )
Pffft, they just get you confused on the merge because they are driving on the wrong side of the sky.