Superwash wool is machine washable and sometimes can go in the dryer. My sock yarns are machine washable, some can go in the dryer. I never block socks because the socks work just fine without the added bother.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper