I'm not sure if the hobby obsession leads to poor health and hygiene, or if people with poor health and hygiene are drawn to these hobbies, but gaming - be it boardgaming, CCG's, RPG's, LARPing, videogaming, whatever - all these types of hobbies draw perhaps the unhealthiest people you'll ever see.
I've attended Gen Con for the last 10 years, and it's just an unfortunate observation. Despite the fact that every person I've ever personally interacted with at Gen Con is friendly and passionate about the gaming hobby, and are generally great people, it's simply hard not to notice that many of them are overweight, in poor health, eat poorly, and sometimes have hygiene issues.
Just one of the side-effects of the hobby, I guess. If you subsist on a diet of Red Bull, Mountain Dew, Funyuns, Hot Pockets and Taco Bell, and never get out of your chair, well, nature will take its course.
It's not anime. It's nerds.
-- Kyle Seely, http://boardgamegeek.com/article/15242571#15242571