I saw a sign once that said "No Admittance Past This Point For Anyone Who Says "Nukuler".
As a former Naval Nuclear Propulsion guy, I suggested that we put signs to the same effect on the access to both of our reactor plants, and it almost flew until the skipper announced that "the Nukyular plant guys were gonna be running tests over the next few days and to not be alarmed." I just about busted a gut.