Yeah, that's ridiculous. The guy at my shop seemed very knowledgeable, just never mentioned the dangers, assuming he knew about them.At least the guy at the shop sold you that efest IMR battery. I've heard horror stories of people getting sold subohm setups, built by the shop, with ICR (not chemistry safe) batteries and just sent on their merry way without even a cautionary comment by the shop that they had a potential pipe bomb on their hands.