I haven't noticed this at the ranges I've visited. However, situational awareness should not be lowered at any range, public or private.
Perhaps this might be a chance to spread knowledge and good will with respect to gun safety. However, pick your encounters wisely...not everybody is receptive to such.
If it's a real problem, then I'd say you need to bring this matter up with the owners of the range. Firearms safety is in their own best interest, too.