I'm pretty sure finding other people's numbers means noting if there looking for u specificallyNot sure I'd like that. They'd get competitors ads all around your own page. In fact out of a potential of 10 natural listings and 6 adverts. Youre one of 16 on that page. So they get a hell of a lot more of your competitors than you. Not a cool way to do it.
It's akin to saying my business card is in that bowl there with the other 15 go find it there for me.