Have you ever watched gaming tournaments on television? The youths I see there are very obese and out of shape, they focus intensely on a readily available game at the cost of their own health
uhm I dunno I can't think of one korean pro gamer that is fat, not even of one that has a BMI more than ~25 (just a rough guess don't have exact figures). Those guys spend 2-3 Hours each day with physical training as you need a well-shaped body to compete, thats the same for chess professionals. Vishinand Anand swims each day 1-2 hours despite hating it, but its necessary for the condition. Give me some pictures of pro-gamers that are fat please would really want to see them (you specifically spoke about those which are shown in television, I won't argue that there are fat competitive players who are good in counterstrike or stuff like this, but even then I doubt the ratio of obese people there is higher than the average).
I also don't see the correlation between competitive gaming and playing much, there are lots of people who play games many hours without playing them competitively.
My problem is not the players themselves who constantly what to legitimize immobility in a culture that is steadily becoming more and more immobile (think Wall-E and floating chairs, equal to that of guided strollers for giant babies) -- it's the society itself that has shaped them and it needs to be changed. For now, I want people to understand my argument more clearly and what I mean about equal reward, and what I meant about tournaments.
If you think the solution to that problem is removing the competitive spirit of a game is very naive. You actually burn a lot more energy when playing competively than when playing a casually, competitive computer gaming is very similar to chess in that. It is by no means a replacement for movement/sports but you surely don't get fat because of it, you wouldn't argue that you get fat from playing chess would you? The two main reasons for obesity are wrong and too much food and too less movement; removing the competitive spirit of a game won't make people eat more healthy food nor will people start to do more sports. That is the responsibility of the education system, the parents and friends.
I suggest multiple segments of the online realm, much like the single player, which is seperated into Easy/Medium/Hard for example. I'd also recommend that the system not be based on ladders, wins, or losses. Then how would such a system have a checks and balances? Actually I've a few developing ideas, but it's something in this spectrum I'd like to have support fleshing out.
Matchmaking based on wins and losses has the ultimate goal of matching up 2 players/teams which have equal skill so both can enjoy the game, no matter how good they are (and If you take a look at Warcraft III where 90% of the players have a win ration between 45-55% it works damn good). I don't see how you can have any as reliable system by having such a crude system with Easy/Medium/Hard and people are categorized in it based on some obscure conditions which even you don't really seem to have a clue of.
I personally feel that recording a player's performance by a ladder system is not only out dated, overrated, and more importantly unhealthy - but it also can lend itself to opening the doors to some really rude community goers who base their right to cruel to others off their ladder rank.
Sorry but it seems to me that you are the hate-spitting person relying on wrong clichés here, and thats without even having a Demigod Client at all yet. Every Community has its bad guys but if you think that they go away just because there is no ladder, dream on.
I do play games competively, run 1000m in under 3 minutes, have a BMI around 20,5 and I am no exception, to all the tournaments I have been either as visitor or as player there was rarely a fat player and almost never an obese player. (But then Obesity is much less of an Issue in Europe and also in Asia than it is in the USA)