Yep, I have no problem with pre-printing my own boarding pass or using the machine, when travelling alone and on business. When I take my family on holiday (including 6 year old kid) I am not allowed, at present, to use either of these. So now what I see is that there will be a reduced number of desks, with lexx and her overworked colleagues, trying to deal with all the people who can't use self check in, as well as the "fast" (oh hah hah, that really was a lol moment!) bag drop folk.
On the exit row question, I'm really flummoxed. Presumably, you can't allow someone to put themselves in that row; on the other hand, the able-bodied passenger without kids will have done the automated process and been sat somewhere else. So ....
... who ends up in the exit row??