This, and it's not about DEFCON, or conventions in general. I stayed at TI a while ago, and didn't have housekeeping come in my room for 3 days (I honestly just don't like people in my room). Eventually they did send up a security team to knock on my door. As soon as I answered and talked to them, they just went away and were happy I was alive. But this is a new pattern by Vegas hotels since the Mandalay Bay shooting, this has never happened to me in many years of Vegas before that.