No, a hat is too easy to obscure, leaving nothing to alert someone of their presence. The number situation that leads to hunting accidents is "swinging on game". Swinging on game is an "every flush" scenario in upland game hunting. Dozens of times per day a party will place themselves in this most dangerous situation. It is only logical to do our utmost to prevent these accidents. Wearing blaze orange ought to be a habit. It is insurance for your family that you're doing the most you can to come home safely at the end of the day. It is easy to do, just put them on. You have to wear clothes anyway, why not have them be blaze orange?