I laughed out loud when I saw this:
My fiancee really wants to add a small breathalyzer to our registry, because we often have friends over and we want to make sure they're OK to drive home, or to take with us when we go out to make sure we're OK to drive home. My mom thinks this is totally inappropriate for a wedding registry and thinks it will "offend a lot of people and damage my reputation." I think that view might be a bit extreme, but I don't want to put something inappropriate on our registry if it is inappropriate.