I've used them in the past. Fumbles do add an element of randomness and fun; that's their primary role.
Realism isn't the issue. Fun is the important thing here - that's why we all play this game, after all. It probably doesn't suit every group through. If your group doesn't find such things fun, then they're not worth considering.
Realism isn't the issue. Fun is the important thing here - that's why we all play this game, after all. It probably doesn't suit every group through. If your group doesn't find such things fun, then they're not worth considering.