Yeah, clicking through the site doesn't find it, but searching via Google seemed to drop me right on the page that had it. Guess it defaults to the "plan your visit" page to do that.
That being said, the pedophile threat is a phantom one, but one that's thrown up as a feel good. Don't get me wrong, it's a horrible crime, but the vast majority are from the people you know. It's far more likely that one goes in with a kid than just without.
As to the whole "not everyone is on the internet" comment... no, they don't need to cater to this. This guy was an exception. A very tiny portion of it. The Discovery Centers are targeted for kids, and parents that are bringing their kids. Their business should be positioned to that, and really that alone.
Sure, it's sad that the guy didn't get to go in there, but that doesn't mean that they should change their business model for that small sliver (any more than LEGO should drop the kid's market and market exclusively to AFOLs). They actually already have something out there. There may be a few outliers that aren't using the internet, but they are outliers. If you fail to keep up with the times, you cannot complain when time passes you by. Sad, but true.
I don't see that they really did anything wrong in any of this, other than maybe not making their rule prominent.
If the above post didn't offend you, you're probably reading it wrong.