I'm sorry, but your thread confuses me slightly. On one hand you say to take down the negative postings, which are all valid opinions, such as yours asking why people are being negative. On the other you complain about how your kids won't feel the magic anymore if you visit this forum...
You see, asking to take down negative opinions/postings would not only be bad cencorship, but also counterproductive, criticism is as important as praise. And would this end with postings? no, afterwards you'd say "hey, the internet is full of construction photos, behind-the-scenes footage, urban myths, youtube videos, and Imagineering blogs...
You wouldn't go to a spoiler website, if you didn't want to find out the ending of a movie you want to watch prematurely. Any forum will take away a bit of the "magic". This Forum, to my knowledge, is supposed to exist for dialogue and discussion.
With anything on the internet, there will always be complaints, what matters, though, is how many people complain about a certain problem or issue (or Frozen!) [i couldn't resist]
And if a lot of people on here are negative, it indicates Disney might do something not quite the magial fairy way they would have been able to if Peter hadn't smoked all the pixie dust. If you want to preserve the magic for your children, don't let them read Disney articles on the internet. Anyways, i don't get what this has to do with your children, they will enjoy the next Diney Trip no matter what.