That's exactly what I thought. Had it been me and my wife with a disabled kid, I would like to think one of us would sit with him/her for precisely the reason the original poster bought up. If there is any issue at all - ears popping due to pressure change, slight bit of turbulence, unless the kid's a frequent flyer it could easily distress him and maybe they were just across the aisle and maybe it's only a baby plane so not that far away but surely if you need to comfort or reassure any kid let alone one with a mental disability quicker is better??
Sad or what - very appropriate name. If you can't see where F3G is coming from I despair of your common sense. I would have asked to be reseated, but I don't like the window seats anyway
Incidentally what is a FQTV?