An advertising idea for films in lieu of using "555" phone numbers

We know that it takes audiences out of the moment when characters in films/tv give blatantly fake numbers like "555-1234" (for fear of inflicting something like Jenny-Jenny harassment to people with the number 867-5309).  My idea is for studios to get a batch of "real phone numbers" for their characters to mention in scripts but then have pre-recorded advertisements playing for those compulsively curious people who inevitably will call those numbers. The ads could be audio trailers just like Moviefone. I know that I've told a bunch of you this idea before (many years ago) and then mentioned how close the zeitgeist came when "Unbreakable" used a real phone number and just had a generic pre-recording that said "This is a studio-owned number that is not in use". But I like that I can use this blog to document my ideas and this one had not yet been time-stamped.