I think I'm leaning toward your thinking Ingrid! Knit without guilt I say! I'm thinking that at the rate my little nephew is drooling, that perhaps he will help to seal off any ends that could possible unravel
I think my best bet is to remove knots in hanks I roll into balls just to make life a little happier. If I see more in any other yarn I get, perhaps I would contact the company. One would think the manufacturer would catch this before hanking (term?) and then the merchant wouldn't have to be concerned with it. :|
I'll repost if anything develops...