All of the WarezCD crews you mentioned make normal CDs, not burned CDs. When you go to a dealer to buy a CD you can often choose between Silver or Gold disks.
Silver CDs are just like normal CDs that you buy in a store.
Gold CDs are burned with a CD-Burner, on CD-r disks, and cheaper to buy than silver.
"Gold" and "Silver" come from the colour of the disks.
The Big Man won't check your snail-mails unless your dealer writes something real dumb on the envelope. Or if he slips in some weed.