It's like when Conrad Hall shot "Butch Cassidy and the Sundance Kid", people were telling him, "You have sun flares in the shot. You can't have that. It's against the rules". But Hall and George Roy Hill kept those frames in and soon it became the vogue ... because Connie Hall did it ... and Connie Hall could do anything he wanted.
Anyway, the first famous clipped shot that I know of was in the first Hitchcock's film "The Lodger : A Story of a London Fog", where Jack the Ripper enters a woman's apartment just as she was about to light a gas heater. The sequence was something like this : the door opens - close-up on a heater - a person enters in deep shadow - gas ignites - its light reveals the killer's face. And Hitchcock lifted a lot from the Germans like FW Murnau and Fritz Lang too.
Often the shots in trailers are very early and not finaled or even in the final edit. There is masses of clean up work done, if this was considered particularly offensive it would be cleaned up before release.
At the same time only we get distracted by it, not the wider audience!