For anyone saying the players can legitimately refuse to be coached by "kids", it's hardly that anyway whilst the session is under supervision.
It hardly amounts to a dereliction of duty from Unsworth, and certainly wouldn't be allowed impact on preparations for a game.
Twenty minutes for gods sake, nothing in the course of a day, and could make a huge difference to the confidence and future career of a young person taking part, to work even for this short time with the first-team squad. Anyone right-minded and with any generosity of spirit at all, would be delighted to participate.
Great idea from Unsworth, reflects well on the club as does so many other things.
Fair play to those who chose to participate in the session, and to Duncan for standing up to a couple of spoilt brats.