Absolute, one hundred percent bullshit. Not in the real world.
A whole lot of it depends on what you look like. I almost got sent to a Spanish prison when my partner and I were driving around Europe in the 70s. We had a van and looked like your typical hippies. We had done absolutely nothing, but because we'd been to Morocco and Portugal, and the way we looked, at the Spanish-French border, they pulled us aside, made us leave the van and searched it fully. While they were doing that, a jeep with six military guys sporting automatic rifles pulled up ready to arrest us. When the border patrol didn't find anything in the interior of the van, they put it in the garage and parked it over a pit, then went down below and searched the underneath of the van, sticking poles up into it searching for drugs. The whole thing took about two hours. Finally, they reluctantly sent us on our way.
You don't have to do a damn thing to be stopped by the police. It can simply depend on what you look like. And I tell you, those guys were bound and determined to find something and were clearly disappointed when they didn't.