No, it won't overwrite the user-set title. The only time that would happen is if you changed the default titles. I think there's an option if I remember right to make sure that doesn't happen.
Yeah, I haven't forgotten about setting a default "check". It's easy enough to create the variable within config.inc.php and have it passed to the script, but to be honest I haven't quite figured out how to get that to show up in the Edit Config Settings in the Admin CP. Any thoughts on how that works?