Bernard, I don't know, I see your point, but I think retailers labels are somewhat different somehow from labels attached by the owner after purchase.
I would always leave a retailers label, although I do vary as whether I take owners labels off or not. If they are unobtrusive I tend to leave them on, but this one is so huge and unattractive, I think I would want it away.
Perhaps it could be peeled off, (assuming it comes off easily - some people use permanent labels, and these only come off with determined soaking and meths or white spirit for the glue...) and kept separately.