Thats funny! thats how to fight this..just keep saying Ad and BC, and keep refering to history in the light of Jesus and Jeudeo/Christian focus. state the fact that BC, became AD when Jesus was born. That we are counting the days since jesus was born...etc.
never give them what they want.
How 'bout those who want to use "BC" and "AD" feel free to do so, and those who prefer "BCE" and "CE" feel free to do so?