Without exception, every local indoor range I've been to has "marks" and scars to indicate some seriously deficient gun handling skills. Two of the ranges have serious camera setups and roving RSOs who aren't shy about correcting unacceptable behaviors. The third has cameras and an indifferent front desk clerk more intent on watching TV sports than range behaviors.
My outdoor range is 40 miles away and has target frames that bear more resemblance to Swiss cheese than range accouterments. I prefer to think we are the beneficiaries of a bunch of never properly trained "newbies" to the shooting sports rather than the victims of determined vandals.
Either way, I have long since adopted an asocial approach to my shooting activities: I seek out places and opportunities to do it without benefit of "company" at the range. As I'm retired, most of my range times are during the week when "Bubba" and his ilk are at work, presumably.