What!!?? (Sputter)...
Not if they're fresh and cooked right. Although, there are a lot of things out there called Stone Crabs.
I grew up in Miami FL, where stone crab craws are a thing. The "Joe's Stone Crab" restaurant and all that. It's one of the things I miss after moving up here to the Pacific Northwest USA. Real stone crabs -- at least the Florida/Caribbean variety -- have claws that are tough like porcelain china. You can cut yourself on 'em, and the meat is big, sweet, and juicy.
P.S. New Year's was just us two at home, too old for parties and driving. Made prawn scampi and salad. Wish I had stone crab claws instead. but this was pretty good.
P.P.S. unless you mean that you need to suck a crab claw to get all the meat out, which is a good thing.