Raj,
I sincerely hope I have not given the impression that I support such an approach
Also, the original posting was not by me, but by someone else. I was replying to the post.
The point I was making is that you can not get such info from the pan number, because although the information is available, it is confidential. The It department is not suppose to disclose it. Some investigators have got it using bribery, but of course in very high stake matters as the amount spent for getting the info is very high.
That said, a quick google search, Facebook and linked in will give you many of the details. I have once found the copies of a candidates internal assessment in college and remarks by the teachers through google because some security flaw in their servers allowed google to reach it (I stumbled on it, was not searching for it)
So yes, what you said is true. Soon all information will be on net and people already use it. The problem today is that the information is not uniform and its your luck whether or not you get the info since the person may or may not have shared his info on fb / linked in