On the contrary, there are thousands.
There are family-only camping areas, family play areas, good food for everyone, and obviously you don't get too close to any of the stages since the speakers are very loud, but all the stages are so big that you can always enjoy the acts without getting close enough to the systems to risk any kind of hearing issues.
10 years ago I wouldn't have taken children, but with the current level of policing and security, it's really no more dangerous than taking your kids to a Blue Water on a sales day. In fact, probably much safer, in that it's a completely sealed/patrolled area.
Sure, there are some drugs casualties here and there, but if you go there to get wrecked you just do that and nothing else, you don't start intimidating families/kids. Go shopping in any major city and how many homeless people/smackheads do you see? (and let's not forget, it costs �145 minimum to get in! And that's before food, supplies, transport, clothing, tents, cash.....)
I think it's good to take your kids to places that aren't too squeaky-clean sanitized; we're too unaccustomed to any kind of dirt it's nice to go and rub your hands in the earth for once.....
And it is enormous. Absolutely gigantic. Room for all (and you never see everything; not even close). For me, it's great to be somewhere where, for the most part, it only appeals to 'nice' (or at least like-minded) people. Horrible word, I know, but it's kind of accurate. Lots of people smiling and having fun.
I hope you go some day.....