I know there was a story last year about Metallica suing a cover band for copying their logo which turned out to be some media beat up lead by false legal letters that one of the websites fell for. To me copying a logo while still technically against copyright is not so bad, especially for a cover band, but copying it to sell t-shirt sucks. There is plenty of unlicensed stuff which flood the market, here the pricks even sell them out the front of the concert venues, but if it was my band I'd definitely sue a Kardaishan for putting their ugly faces over my band image.