Stolen art sold at conventions

Hey guys! I had a great time at SacAnime but while I was there, I saw a vendor's booth called Hidden Supplies selling sakimichan's Kakashi painting




I asked her if she gave permission for this or not, and sure enough, she didn't. I think it's safe to say that the rest of the $25 mats sold at the booth were also using stolen art, but I don't recognize any of the artists. Here are some photos of the booth and all the mats are also listed on their website www.hiddensupplies.com/index.p…. Please take a look and report the images you recognize to the respective artists so that they may take the proper legal actions against these these people. Thank you!