i work for a 'leading' British charter operator and for many years now we have given a full (semi ABP) briefing to all passengers sat in seat rows adjacent to 'self help' (o/wing) exits, including checking for hazards etc and full opening instructions, suprisingly on a couple of occassions pax have asked to be moved as they dont want the responsibility but most listen carefully and are happy to sit there (usually due to extra legroom)