We shoot at the Manatee Gun Club (only 1000 yard public range in Florida) and they recently installed numbered markers in the ground at the 100-400 yard paper target lines, corresponding to the bench locations, so that everyone stays "in line" and doesn't shoot through someone else's target.
There are still potential issues because the steel plates are at 565 yards, behind all the paper and the RSO's always ask what range you're going to be shooting at when you arrive to try to minimize problems.
Any shooter would know at first glance down the tube whether there's someone else's target in the way- but yeah, I'm sometimes amazed (and the RSO's tell some crazy stories) at the way "beginner" is re-defined all the time.
Everyone has to learn- but some make no effort. Downright scary, sometimes.