I agree with that, horrible screeching noise great for alarms but...
I;'ve had a plan for years for a speech doorbell, simple enough really just havn;t got around to it. I'd use phrase like southparks, "hey dude vistors" (from cartmen gets an anal probe)
or aliens the young girl "They mostly come at night, mostly"
Now coupled that with some sort of recognition of the bell ringer, and I could include obsenities ... JWs. Father Jacks, Feck, Arse, girls.
I'm sure others could come up with interesting ones.