Friend to me: Why aren’t you on IM? Or have you blocked me from seeing you?
Me to friend: i dont have the IM client that speaks AIM as an auto start.
do you not use Skype?
Friend to me: Not very often. AIM, Yahoo messenger and google AIM are the 3 that I have up/running most often.
But for my colleague's apparent neediness and the resultant suggestion of stalking, this reads like two partners contemplating federated identity operations exchanging metadata to determine how best to communicate.