Caesars, and the other hotels, are trying to find a balance between the security needs of the guests and the security needs of the staff. It's going to take time to work everything out.
Just a few weeks ago, the hotels reached an agreement the maids union to provide every one of them (20,000, at least) with wireless panic buttons that geolocate them down to the floor and room. Even Google doesn't have that kind of granularity.
And all of the security changes have to be worked out between the property, Metro (the regional police force), the FBI and others. It's a complicated process.
What happened to a small number of people at DEFCON is sad and wrong. But chances are it's wasn't malicious. On a busy weekend, 350,000 people visit Las Vegas. The number of people affected by what happened in the blog post is less than a rounding error. Mistakes happen. Security people are still people. Life will never be perfect when you interact with wetware.
For the record, our room bill at Caesars alone came in at over $50K
$50k is nothing to Caesars. You see bar receipts for more than that discarded on the floors of the nightclubs there.
/Written from a nearby property, overlooking Caesars