Antisocial behaviour can get certain people to avoid you, but it tends to show up in reviews.
LOL! That's one of my tricks too. The people at work* probably would be very surprised if they met me outside work and might even ask: "Hey, why aren't you this friendly and talkative at work?" Um...maybe it's because I want to get *work* done at work, and programming does not lend itself well to being interrupted every 5 minutes with a phone call, sports blabber, chit-chat, etc.
Heck, I've been too busy to visit PerlMonks lately - now that's *busy*! ;)
*This applies to the non-programmers only, of course