My best guess as to why they changed this procedure is not to increase security (since they know body scanners to be ineffective), but because so many people were opting out that it was increasing delays. I always opt out and notice they try to incentivize me by saying &quot;We&#x27;re really busy right now, it&#x27;ll be a while&quot;. I always politely wait. Sadly, now that they have this as an option, I doubt I&#x27;ll want to do much flying anymore.