Um. Living only a virtual life isn't possible, cause there's still stuff that pertains to one's physical reach. But well, it is always likely that there should be this real big hole in a person's social circle that they choose internet as a better medium to 'have a life'. I think it is very easy to manipulate on the internet, and the works. I guess being online is mostly avoiding the inconvenience of going out and discovering people are the same everywhere, you can't really classify into kinds the people who do whatever they do on the internet, not really.
Well, living only a virtual life isn't possible. I should have clarified that I meant social life because that is the context of the discussion.
Yes, as I said earlier, it is odd, weird and sometimes creepy to think of a person who relies heavily on internet for his social needs.. but I would still not call them a loser. As I said, depending on their use of the internet, they can turn out to be a genius or a pedophile. I would also agree that it is one kind of weakness or a disease that a human would rather spend more time with computer than other humans but... well... there are different people.