Life is too long and we meet people and loose them. You had been in armed service and served throughout India. If you think now, how many people did you come across, and don't even know where they are and how they are? Surely you contact list is many times longer than me but to some extend I also have the same experience. Some years back, I happen to go back to a village that used to host me as a guest 2 decade back. I inquired about 2 guys, who used to be my closed friends at that time, both of them were brothers, and found that one of them died in Armed services and another one died because of some disease. These were personally known to me.
We are on a virtual world, were we are not expected to know each other personally. I well understand your feeling, which is shown in the form of fear. However, I personally feel, the virtual world should remain virtual only. If two individuals find that they should come close and share there contact details, personal information etc, so that any happenings, mishappening will be known to each others, that would up to those two individuals. But on the public forum like this one, I think the way this operates is absolutely correct.
My personal views.