I think this is the approach I'm going to start taking. At the very least I don't think I'm going to give out my phone number, not because I don't want people to contact me through that method, but more that I don't necessarily trust them to not get infected with malware or something that steals all their contact info, and my number right along with it.
There's too many things a phone number is used for, it shouldn't be used as an identifier but it is, unfortunately we have to deal with that.