The _least_ obnoxious was when the TSA agent heard my "I'd like to opt out" message, shouted "REFUSAL", made me stand _next_ to the scanner for approximately 15 minutes before finding someone who could pat me down, occasionally glaring at me for effect.
The pat-down was respectful, though it was done inches away from my 9 year old daughter, but the core of the issue, to me anyway, is that I object to both the new scanners AND the pat-down.
I've adopted an "only fly when I have to" policy, which meant 6 hour drives replaced flights to New York, but there is regrettably no way of avoiding all my business travel in lieu of driving.