Wow, some of you guys are naive. Sure you CAN throw a deck and 2 sleds on your truck without the frame bending. There's a lot of things you CAN do. Is it smart? No Is it safe? No Is it legal? No
Most 1/2 tons don't have the frame, suspension, brakes etc that a truck rated for that weight does. Not to mention most guys don't even understand GVRW or even tire pressure and ratings for that matter. The ratings of our trucks and the laws are there to protect yourself and other people on the road. It's a safety margin for everyone. It's not a dare for some guys to overload their vehicle and limp it along to get where they're going. Just because you made it to the hill and back doesn't make it safe or right.
Sorry for the rant but I've got better things to watch for on the road then guys who think they are a better driver or know more than the rest of us "naysayers". See what happens when you get in an accident overloaded. It would have been a lot cheaper to just buy the right rig in the first place.
I'm not knocking your trucks, just some people's decisions to put others at risk piss me off.