The teens claimed CBP targeted them because they hadn’t booked hotels for their entire stay in Hawaii.
“They found it suspicious that we hadn’t fully booked our accommodations for the entire five weeks in Hawaii,” Pohl said. “We wanted to travel spontaneously. Just like we had done in Thailand and New Zealand.”
I’m sure it happens occasionally but I’ve never actually heard of CPB asking for hotel bookings, just outbound flight number. This is stuff you’d submit on a visa application. If the US wants to make Europeans get visa to travel then they should just do that.
They have asked for both and in one case they have asked for bank statement. This happens very often to citizens of third world country. We just knew what to carry with us all the time and no issue.