Agree with most of your post, but to be fair, the away lot are there on merit (unless they've got someone else's ticket). Sure there's people who go more now we're winning more often, and I don't agree with it, but the sort of person you're talking about maybe now goes to every away game and before went to half of them...they still went to half before, therefore they've earned the LPs and the right to go more often now IMO.
I know a few people like that. Personally I don't think I go to many more games when we're doing well. If it's a midweek away game far from London, I guess I'll only make the effort if it's an important one, but weekends I'll always be there whether we're first or last in the league.