Perhaps, but I think you should have to purposely go to someone's profile and actually look for their phone number (provided they posted it).
I checked my 'friends' list, and nearly every one had a phone number listed. I just find that sort of cross-referencing unsettling.
My friends don’t post their phone numbers. Apparantly yours did.
Yes, I found the numbers also. I don’t think these people know this is going on so I told them. If they want the numbers posted so be it, but at least they are informed.