Ok, guys here's the deal and for what I care you can tear every warning out of car and manual.
I have defended hundreds of product liability cases for over 20 yrs including defending auto manufacturers. Most of these cases involve claims of "failure to warn", a legal theory of recovery. If you lend your car or if you have a passenger in the car and they are injured or killed, they, or their estate will file suit, and let's say one of the theories is they did not know to wear belts with all the other supplementary restraint that are in the car (or a child gets whacked by a by sitting too closely.)
They sue GM, you and everyone else they can. GM's engineers inspect the vehicle and the first thing they see is the warning labels were removed, GM cross claims you the owner. The failure to warn case is now yours--congratulations. A jury in East Tx or South Fla (or some other legal cesspool) buys into the story that the removal of the labels was a causative factor in the injuries or death and returns a multi-million $ verdict and your insurer pays the policy limits of say, $500K the rest coming out of your pocket. Not a pretty story and it happens more than you think.
I must say my favorite warning in roadsters is that the back seat is safest for kids.
Anyway, remove all you want just remember there are risks involved--you have been warned.