I think trying to define commitment levels by 'dynasty' or 're-draft' misses the real issue. I have played in a dynasty league for more than a decade where it goes to sleep after the Superbowl and wakes up with the Fourth of July. Everyone (but me) in the league wants it that way and they love the game and play hard for the 7 months they play. I think 8 of the 12 owners are lawyers. Its not an easy league, just one that's dormant during the off season. I don't think I have any place to complain about it, since everyone else is happy with it. I see my choices as playing in it or not.
My point has been made before, but the issue here is getting yourself into leagues with similar owner expectations, not setting your own and #####ing about people who see life differently than you do. If you choose to stay in leagues, I can see urging people to be more involved, but if they pay their money, they get to participate how they want to - unless they agreed to ceratin commitments before entering. being dynasty doesn't imply YOUR level of participation. I say make expectations clear for your league, only play with people that agree and you will never have a problem. Trying to run other people's lives, however, rarely works out well.
That said, not responding to emails (or trade offers) within 3-4 days, unless you are away, seems passive -aggressive to me. If you can't do that, I suggest you also seek leagues that shut down when you don't want to pay attention. If we all got with those enough like us ... but isn't that the secret to marriages businesses and much else in life? And perhaps the greatest value of the internet?
My thought is that if you are #####ing about someone else who is happy doing what they are doing and hasn't promised or agreed to do something else, its your problem, not their's.