@[url=https://social.wildeboer.net/users/jwildeboer]Jan Wildeboer 😷:krulorange:[/url] France has done that for ages. Whenever I enter France with a male passenger and Dutch plates, I am checked. Thoroughly.
Who are you, where are you going, how long have you know each other, what's in the car... If I'm lucky they don't put their dog into the car, wouldn't be the first time the upholstery is damaged that way.
Only, it's not exactly at the border, it's a few hunderd meters further into the country, pulled over by the police. So it's not strictly a border check, but it is a border check.