Here's my two cents....
My hubby and I both worked on Bourbon Street for years. For those of you who don't know what Bourbon Street is, it's an adult oriented street full of night clubs for straight people and gay specific and strip clubs galore. You cannot imagine the amount of people that bring their children up and down this street on any given day/night. People here urinate in the street and god knows what else:hurl:. Now, you would think that if you do not want your children to see something, you would get off of the street, right? Not in New Orleans! They continue down the street as if nothing is amiss. They don't notice their kids noticing the scantley clad strippers in the doorways or people of the same gender making out in the street. They pay no heed to the guy dancing naked for the few minutes before the cops finally drag him away after everyone has had a good laugh. And they don't flinch when the man (or occasional mule) is laying dead in the street because bouncers just kicked the crap out of him. Well over 200 kids under the age of 12 will walk down this street everyday.
The point is that some people don't feel the same way about nightlife as others. Those of you who enjoy the "adult" themed areas of Disney are worried that this may not be the place for kids. I assure you that there are worse places

.
A family worried about traditional family values would do better to sign their kids (under 12) up for a kid's club program. They are available at most Deluxe resorts for a fee. But what do you do with you teens? Disney Quest is a great place to leave those guys while the adults go down the street to play. **Disney would do a deal better by providing a teen club and this would also satisfy their pocket book as well.***
What happens when the same family can't afford to leave the kid's in their age appropriate places? Should Disney say, too bad for you? Logically we can all argue that these parents should forego PI until they can either afford to leave their kids somewhere or until they are on an adult only trip. But, this may be "THE TRIP" and they can't afford to return until the kids move out. These people want to see PI.They want to participate in the New Years celebration that they have read so much about and they think it would be fun for the kids to be sprayed with a confetti cannon. They may not have a bourbon Street to visit back at home. Disney wants to make more $$$ so they allow this family into PI in hopes that they will make a purchase while they are there.
In order to capitalize on the family, Disney says "come on in!" and in turn they make age requirments so that the partying adults can enjoy spending their money too without the patter of little feet. It's a nice trade-off so that Disney can make $$$$$$$$$$$.
So, now that I'm done with the psycology/marketing stratagies of Disney PI, let me offer some advice...
We all want Disney to make money because the more money they get, the better the parks/film become. If kids make you uncomfortable while you're getting sloshed, stay in the clubs that will not allow them. Everybody wins this way.
....and if you really want to party....Mardi Gras is next weekend. See you on Bourbon Street

(But don't bring your kids:lol