I'm fairly certain Dan-Air's 727 -100 / 200 's had some rearward facing seats near the o'wing exits as a friend of mine at the time said how much she preferred them when travelling to Malaga on a regular basis. ...and madam was, as they say, somewhat particular at times. We have rearward facing seats in trains after all so what's the difference from a pax perspective..if any ?.
Never bothered me when being carted around in a VC10 c/o Aunty Betty I have to say.