Four thousand copies of my music were being offered for “trade.” (I put “trade” in quotes because of course it’s not really a trade, since nobody’s giving anything up in exchange for what they get. It’s just making illegal unauthorized copies, and calling it “trade” legitimizes it in an utterly fraudulent way.) I clicked on the most recent addition, and I sent the user who was offering that music an email. This is what I wrote:
Nothing too formal or threatening, just a casual sort of suggestion.