Your experience is why I feel so blessed to live on a large block of property where I have my own range set up.
I can play and spray with the ARs, make some real noise with the .50 or get serious out to 1200 yards and there is no one for me to bother....... and most importantly no one to bother me!
I understand your rant and agree totally. When shooting on a range where other people are shooting, one should always be considerate of others. I am a member of a local gun range, but the only time I show up is to shoot trap. For my rifle and pistol shooting I will stay home and leave the public/private range to the "OI's" (outdoor idiots)