I carry a pocket knife everywhere, so this one is a legit concern for me. It is as natural as putting on my clothes for me to put my knife in my pocket, so I'm always concerned that I accidentally put my knife in my pocket, despite being very intentional about leaving it behind. I paid $280 for the thing, so it would be a damned shame to lose it to stupid-ass TSA.
Pack some prepaid package envelopes with your home as the destination. TSA got a problem with your nail clipper? Leave your favorite knife in your pocket by accident? Put it in the envelope and drop it in any USPS box.