Hit the nail on the head there Steve - again.
In 20+ years of DJing I always have and always will play originals only. If I don't have the record, I can't play it and in developing my set I will look at what I have, not what I wish I had or what others are playing.
There is nothing more galling than hearing another so called DJ playing something off a boot, particularly a 70's boot which he/she bought around the time he/she left the scene only to return 25 years later proclaiming him/her self to have been at the centre all the time!
Do promoters care? No, probably not. Getting people through the door is their primary concern so why bother? Oh that and DJing themselves - not always a wise move. They should though. In providing a quality service to the paying customer they would win a loyal and appreciative following and encourage travel to the venue.
Do punters care? Well I'm a punter and I do! I feel cheated if someone has not taken the trouble or is just not into the music enough to want to own and play an original. Of course you can tell. Sound quality, a DJ playing a record that is clearly out of sorts with the rest of his set or those who cover the label either on the decks or after it's finished. Also there sometimes seems to be a hurry to return said disc to it's box.
As for playlists, well why not publish these? This scene is about sharing music so why keep it a secret? Sadly I have seen those who post correct labels when they have not played off that label so it may not make much difference.
I still fear, Steve, that it ain't gonna be solved as the root problem is very deeply um, rooted. The symptoms are too many venues and too many DJs and we don't seem to be able to change that. The effect is that the scene is a watered down version of what it was with no need to travel, you can hear the same boots everywhere.
John.