I'll start by saying that I loathe the cinema and go as little as possible, so this may be coloring my view. However the DC enjoy so I make myself go occasionally. Today was one such time.
On the very front row (so only the screen in front of them) was a group of 4 women and their assorted children ranging from I'd guess 18 months to 4.
By the time the trailers were over half these children were bored and were up and down from their seats constantly walking over to their mums (who had chosen to sit at one end of the row all together so not even next to the DC) and chatting to them. Presumed it would get better when film started.
It didn't. I'd say only a couple of the children (there were 6 in total) actually managed to sit and watch the whole thing. The others were up and down, walking round the front bit and at a couple of points going right up to the screen so as to block the view. Parents seemed oblivious. At one point I got up and spoke to the usher who had "a word" which only meant the parents were a bit more diligent about getting their children to sit down once they started wandering and shushing them when they spoke - it was still disruptive.
Clearly only the 2 children that sat through the film got anything out of it. On the basis that the cinema is not cheap (this wasn't a cheapo kids showing where I might have had a bit more patience) why on earth would you consider this a sensible place to take your "not interested" toddlers (especially on a nice day as it was here today!)?
AIBU to think that you shouldn't take your DC to the cinema unless they will sit quietly through the film!?