penbihahhg
I can confirm the whole yelling thing at LAX.
I am a US citizen and travel frequently. A few years ago I returned from a trip at LAX, sent to the secondary inspection area, and yelled at by the CBP officer while going through my items. Then came the full media search, which took a few hours.
What made things worse is I am a co-founder of a VPN company and had with me source code, client data, encrypted backups, medical records, and other sensitive data on my phone, laptop and USB drives which I assume they inspected (and copied?) during their search.
I have since passed through LAX on many occasion without further searches, however it was a shocking experience that causes me a great deal of stress to this day whenever I think about going though that airport.