I think some of the higher level of self-disclosure in internet conversation goes back to what I said in a previous post. If I'm trying to talk to someone, I have to come up with all of the words in the right order with the right tone while the person is sitting there staring at me. If I'm trying to develop a point and the person asks a question or makes a statement, then everything that I've tried to do to develop my point may be lost in the confusion. If I start to say something and the words come out wrong, I can't just hit the backspace key and say them again so that they'll be right. I can't say something, wait an hour, listen to what I said to see whether I spoke as I meant to speak, and then go back and make my statement correctly. As a result of these limitations, I am less inclined to discuss certain topics in live conversation.
I've never read Les Miserables, so I can't help you there.