I've heard of a decent Creepypasta that details someone playing a game they're so absorbed by that they refuse to stop playing it and eventually starve to death. It's a freaky premise and a legitimate concern because addicting habits like that actually happen in the real world. It reminds me of a news story wherein police investigated a house that the owner, an old man, hadn't left in a week, and the place was starting to stink. They found the decaying corpse of the man sitting on his toilet, one hand over his crotch, the other still clutching a pornographic magazine. It's pretty obvious what he had been doing in the last few minutes of his life.
Moderation in all things, people.