Hi Mick.
Out of interest how do you know what label it is on?
Unless you check every record that is played on the night you really do not have a clue that the record you have just heard is on an original or not! Even then the label could be fake so in reality you would have to check the scratching or the marks on the record to be 100% sure.
If a DJ plays a record that you believe to be an original but is in fact a carver/boot would it really make a big diference to you?