dryers and stupid clothing companies

There should be a rule. EVERYTHING CAN GO IN THE DRYER UNLESS IT SAYS IT CAN'T! If the clothes will shrink if they go anywhere near heat then there should be a label on them with exact instructions on what should be done with them. I don't see labels on each individual sock I own, they all go in the dryer. 100% cotton into the dryer. And what's with the stores and you ask them if the clothes will shrink. Every store says it might shrink a little bit in length. It won't shrink in width...