Actually it wouldn't surprise me hugely if there were 1 or 2 pros who browse these online forums/fora/forai??? occasionally. However I'm not sure there is too much to learn for one from them.
I am a forum regular on a UK guitar forum and there are certainly 1 or 2 pro players who post regularly (it is a very strong community there though). To name drop, Paul Gilbert(hands up if you have heard of him) has posted there on occasion although it was for a very specific reason.
Hotels are very lonely places and I suspect that many pros spend their evenings on Playstations/Net etc.