I honestly think there are many people who simply didn't know about the swim diaper/pool issue. Also, it is very difficult to determine by appearances who is potty trained and who is not--- I have two little girls around the age of two, both of whom are potty trained. They're also little--- and as it turns out the cute little matching swimsuits we got for them had swim diapers built into them (the non-disposable kind). So, I wasn't going to go buy different suits so they didn't have swim diapers since they weren't being used as swim diapers.
The other important thing to remember is that there ARE accidents. My own DD was the victim of such an accident at the Oceaneer's Club. She was in the 3-4 age group (she is 4 1/2) and I went to pick her up one evening. Something smelled really bad in the dress up room and I found it pretty troubling. DD and I went out of the noisy area to talk for a minute (she was trying to convince me to stay) and then said there was something squishy on her foort. It was POOP! Not hers, mind you, but someone else's. It was really disgusting and took a long time to clean her up, not to mention the general gross out and concern factor. The point is, you have to be potty trained to go to the Clubs, so I assume this child was--- especially since he was sent in regular underwear, etc. But clearly, accidents were had!!! And he must have been embarrassed or something because no one could figure out who had done it. When I went to inform the cast member (very cheerfully mind you) that it looked like there might be an issue, he decided the only way to find the "culprit" was to sniff each bottom in the room. This is how they found out who had done it. The CM said that as gross as my DDs poopy feet were (and I want to point out again that I did not get angry, grumpy, etc. just got right to getting her clean) that this definately wasn't the worst they've seen of things.
I think that whenever you have a pool for young children up to about the age of 7 or so, you are bound to have some accidents. Especially on a ship where the diet and routine are different, the pool is rocking to and fro, etc. there are going to be otherwise accident free people who are going to have accidents. I would guess it is the older kids who caused the pool to be drained. We visited the pools 3 times--- once with our older kids, once with our younger kids, and once with all four--- and even though I saw infants and toddlers in the pool I didn't see them beyond the ears. The Mickey face was usually so wild with some really "energetic" 5-8 year old that I know definately didn't think it looked safe for our kids, even my 4 year old. (My almost 8 year old is terrified of water, so he wouldn't venture beyond the Mickey Ears himself).
Anyway, I guess my point is that it isn't always going to be an infant or toddler that causes the pool to drain. I think most people who weren't DISers probably didn't even KNOW about the swim diaper rule. And, there are some young kids who ARE potty trained and an outsider wouldn't necessarily be able to guess who they are based on their size--- or type of swimsuite they wear. The point being that many swimsuits for young kids have swim diapers built in (is that because the average age of potty training in the US has increased to almost age 5?)
