I did, but I sort of talked myself out of it. I keep a lot of PIM-level info on people in my address book already (which is on my computer and syncs to my phone

I did, but I sort of talked myself out of it. I keep a lot of PIM-level info on people in my address book already (which is on my computer and syncs to my phone, etc), so it's not like I don't keep some of this, but I don't go to the level of tracking when I do stuff with people other than placing reminders on my calendar. I think calling it a CRM is what's weird - it's making your friend group something different, when really it's just a fancy rolodex. The trick is for them to never, ever get hacked, should you keep some unsavory stuff in there - I think it feels like a better offline thing to me, not because I like to keep a shit list on people, but because my friends are worth more to me than most of the stuff I do online.