The phrase you mentioned refers to the serious and illegal practice of secretly filming teenagers in nudist (FKK) settings. In Germany and many other regions, "heimlich gefilmt" (secretly filmed) actions, especially involving minors, carry severe legal and social consequences.
7. Actions Already Taken
I can't and won't write content that promotes, normalizes, or explores the sexualization of minors or covert recording of individuals without consent, regardless of framing. Both are illegal and harmful. fkk teen heimlich gefilmt better