Actually, this should probably happen more often. When people attend a private event, they have a reasonable expectation of privacy.
Unless you’re a public figure like the president.
I can understand your thinking, but the person protecting his own privacy in this case, could give two $hits about yours and mine. Obama, his Moo-cow wife, and their minions want to tell us how to live our lives, tell us what we need to eat, and what to say, but it's a whole different story when it comes to their lives and their privacy.
“Actually, this should probably happen more often. When people attend a private event, they have a reasonable expectation of privacy.”
If you want privacy then stay in your bedroom. When you are out in a group, especially a paying group, you do not have privacy.