The fact that he's married with child (children?) should be enough to keep him from saying hello, don't you think? Or maybe not. Boundaries are apparently subjective, as I've learned in this life. The last time he wrote he threw in that maybe someday I could agent his book. You know, because the allure of that would be SO much that I would jump at the chance. Emmmm thanks but no thanks.
I guess that's what happens in the electronic age. First, people can find anything they want about you on the internet (including the semi-flattering pictures you post, aware that this sort of thing could happen). And then they can *act* on it. They can make you their screensaver, they can track your contact information, they can bypass your personal email (where you deleted them) and show up in your work inbox at 10pm on a Monday night (yet another reminder that shame on she who checks work email before going to bed).
No one knocks on email. Don't you wish they did?