Definitely, definitely, write to complain. What you describe sounds like the height of laziness masquerading, once again, as "security." (Unless, of course, you really were sloshed.)
With service like that it won't be long before they lose their last paying customer in C.
Here's the contact info for you.
http://www.united.com/page/article/0...omer+relations
If you're an elite member, use your elite email contact.