Oh man, Bob strikes again. I love how these guys always have the same vibe, like they hand you a tip with total confidence and zero research to back it up. Drywall screws are basically tiny glass sticks, they snap if you so much as look at them wrong under load. Wait till you find out what else Bob's been wrong about. Bet he told someone to caulk a whole shower with silicone and call it waterproof, or that you can just dump concrete straight on dirt with no gravel base. Next time he offers advice, maybe ask him for his sources first, that should be a fun chat.