I had many 'randoms' added on MSN messenger. Usually acquired through everyone inviting his complete contact list to one conversation. We used to discuss all and sundry back then.
I was always slightly more nervous messaging the girls (obvious from their elaborate emoticon-saturated screen names).
Curiously, one of my friends had a contact named 'korea@hotmail.com' who was always online but never replied.
I sometimes wonder how many of them are doing now.