It is something our generation faces thanks to social networking sites and chat lists. We meet people in some strange circumstance, just like our parents would have, on flights, on trains, during weddings etc,. The difference is now they can look you up on the internet and 'keep in touch'.
Everyone ends up with a couple of hundred friends on their friend lists. Well of course you can select who goes on that list and who does not, but it is not often we refuse a person's friend request. Especially not right after we have met them.
It is usually nice to keep in touch with people you meet. Our parents did by exchanging addresses and phone numbers, but that initial excitement and most of these people lost touch and became insignificant. It is not too different now. But, all these people you meet leave residues by being part of the friend list despite not keeping in touch. It is like you can surely contact them anytime but you never do and then feel claustrophobic. The illusion of being in touch.
My personal experience is that people we are really close to never contact us via social networking sites, chat yes but that again depends. My closest friend and I have not spoken in months. She came online last evening and said call sometime. I said sure and signed out. I still feel really in touch with her as compared to all the people I chat with and have on my friend list. I don't know if she is on my friend list. I don't remember the last time we chatted, except for the two sentences last evening.
At this point I really have like five or ten friends I would like to keep in touch. I know I can delete the rest from my list, but what if I want to add them again? What if I need to find a job. Networking is the key to all of them and hence I continue to be part of twitter, orkut, facebook, yahoo messenger, g-talk and linked-in. But, I have made up my mind I will not join any more sites. I am done with these illusions. If in the end I need to get a job I will, based on my karma, ain't it?