I guess that's what I don't understand about most of those posts. People get SO worked up about the most trivial things.
It has never crossed my mind to look in someone else's stroller and attempt to make a guess at how old the child inside is and then pass judgement on the parent based on it. What is up with that? I'll bet that the same people that argue "That child is too old to be in a stroller" are the same people that tsk-tsk about parents who take their baby to Gymboree classes or whatever because "That baby is just too young to have scheduled activities like that".
In other words, "You are not raising YOUR child the way I raised MINE... so you must be doing it WRONG."
I guess I'm one of those that doesn't pay enough attention to what other people are doing while I'm at a theme park. Unless you actively cause me pain or distress, I'm probably not even going to know you are there... and even if you run over my toe or bump into me or *gasp* break in line in front of me... I might have a moment of "Well, that was unpleasant" but it will not last longer than a moment or ruin my whole vacation.
The way I see it, those people that fixate on a pet peeve (mugs, strollers, heelys, etc.) are going to be on the lookout for those things when they go. Inevitably, they will see whatever their pet peeve is and come back here to the DIS to rant about it. Personally, I go looking for a fun time with my family. That is what I fixate on when I am there. That is what I come back here to share.
I know... crazy, huh?