Very interesting discussion of phone numbers ... but heading somewhat off topic. I've "been there" many times and have my number (and my name, and my postal address too) very visible on the net ... that's a personal and business decision and it's up to others if they take the same or a different view. I don't have an "ex" stalking me (as some do) or other circumastances where it would be a problem. I've nothing to hide.
Should I (as moderator) have taken the phone number off? Should I have dropped a note to the poster, saying "hey". Perhaps I did the latter
... to do the former would have meant that I didn't trust their decision to post it and was acting as a cross between a nanny and a censor. I've been known to do that, but I'll only do it in extreme cases.
Suggestion - if you would like to talk about this further, shall we separate it from this thread and go either to PMs or to somewhere like the assistance board or pettifog and treat it as a general topic