OK, full disclosure, I am a rule follower. Don't save seats in the theater or pool area? You got it! No kids in the adult area? I won't even let the kids walk through to get on the elevator. And...I'm raising my kids to be rule followers.
I think the Disney ships are a great place for a kid to have some autonomy. Once they are a certain age, they should have some freedom to roam, but in order to gain that freedom, they must understand and follow the rules! And, understand the consequences of not following said rules. My DS experienced his first
DCL cruise when he was 7, and the last time he was 13. At 7 he was allowed to go to the beverage station by himself, but starting an ending with us (i.e., he could only be gone as long as it would take him to get there and back). He broke the rules once (wandered over to the arcade before coming back) and was confined to the cabin for the evening. Over the successive cruises, he was given more freedom, but more rules (i.e., at 10 he could check himself out of the club, but if he was not with us he had to be in the club or our cabin. At 13, he had a bit more range, but that time we made him sign a contract with a list of rules, for example he needed to back in the cabin at a certain time, no rowdy behavior in the hallways, etc. If we got even an inkling that he was not behaving (and it is amazing how many times you run into your kid on a cruise ship) his privileges would be rescinded).
When he was 7, there was no Nemo's Reef, and likely he would not have been there by himself (although I'm not sure how Nemo's Reef is situated, it is possible if we were at the Mickey Pool we might have let him go over by himself), but if he bowled over any toddlers coming off the slide?! Lordy, we would have been sitting in the cabin the rest of the afternoon!
All that being said, I agree there is a huge difference between the age of 8 and a toddler, and that age range needs to be rethought, or parental supervision needs to be mandatory.
Now, as for the thongs. I don't get that either. But, frankly, I find old men in speedos to be more offensive (especially when the speedo is paired with socks and sandals!)