Another way of looking at this is ok say you lived in lets say a little village in the shires and 2 miles down the road a few locals lets say 25 people get together , some know the 10 soul commandments and some don't. I have seen this happen in deepest darkest Essex or was it Suffolk. They had a job knowing the title let alone the label.
One girl pops up and says I can do a spot I have collected lots of stuff all inexpensive , not sure if they are originals I know I have some grapevine issues eeeeeer whats that other one 7's but they are all superb sounds. I believe some of these would cost 1000's to buy as original. We could have FUN and appreciate the songs ! and maybe dance ! one day we may even be able to afford a real one !
Would you stop thier limited supply on the night to hear lets say Boogie wonderland and the such like that between them they can muster up as original 12" recordings ? or would you let her play her oh so so soiled copies of items you are NEVER likely to hear on a Sunday night in the shires with your pork pie and a pint. ?
I suppose you could stay at home and torment the cat
It doesn't warrent the Soul inquestion or Stone throwing in my view.
Now if it happened at lets say the 100 .... then that's a different story if you can afford the time to check each Dj's labels that is .
I would rather be dancing myself and let those with a massive credit limit on their barclaycards worry about it.