I've owned and carried one or more Government Model pistols since 1966. When I was younger, I had some minimal problems with the grip safety activating. I have found several ways to block or deactivate the grip safety during the years.
In my mind, the best way is to field strip the pistol, then remove the mainspring housing pin, then partially remove the housing itself. Carefully insert a bit of debris of the correct size - small bit of brass stock works well - between the 'lip' of the grip safety and the 'lip' of the mainspring housing; carefully positioning the mainspring housing and pin. If done correctly, the grip safety is fully depressed and don't move. (Removing the debris and the grip safety works again. Nothing cut, ground, welded, soldered or scratched.)
With all that, I don't see the need for a grip safety on the Government Model. In my thinking, it is, like the magazine safety, an 'idiot device' and offends me from a philosophical standpoint.
As K1500 said, any Government Model that fires when chambering a round is defective. The trigger pull has been reduced too much while not ensuring the sear is fully seated in the hammer full cock notch. That specific example needs work.
Someone mentioned IDPA rules prohibiting deactivating a grip safety on a Government Model. PLEASE, do not confuse any game rules with reality. There are any number of 'games' who do not trust their members with firearms - sometimes with a degree of rationality. But DO NOT make the mistake of conflating a determined artificiality with reality.
What John Browning did and didn't design. Grip safeties, manual (thumb) safeties, firing pin safeties, and so on.
The Colt Government Model was designed between - depending on the details of what gets counted - between 1903 (thumb safety) and 1911 (date of acceptance). Browning's first design was produced by FN of Herstal, Belgium. That was the Model 1899 pistol in 7.65mm. It was updated and reintroduced the very next year as the Model 1900 in the sturdy .32 ACP caliber - which was designed by Browning as well. (And yes, I am aware of the calibers, I was being silly.)
What a modern shooter needs to realize is most everyone, both in the U. S. and Europe, were much more familiar with revolvers. With a revolver, one loads the arm and carries it hammer down until need. Then one cocks the arm to fire or simply pulls the trigger hard as applicable.
So, the reader will notice Browning's early designs with a concealed hammer had manual safeties - but not always grip safeties, while the exposed hammer types lacked a manual safety and mostly lacked a grip safety.
The exposed hammer guns were cocked for use and then the hammer lowered for holstering and carry. Just like a revolver, no?
The U. S. Army wanted a new pistol. The primary user of the pistol - at the time - was the U. S. Army Cavalry. They rode real, four-legged horses. So the design of the pistol was predicated on making the pistol safe without firing off as many as eight rounds into the ground or sky. (With a revolver, one would need fire no more than one round into the ground to - more or less - 'de-cock' the revolver. The horse needed to be controlled with at least one hand and complicated the procedure without lighting off a round.)
Do I feel safe with a non-grip safety pistol; even with a round in the chamber? Yes, I do.
A Government Model is in fact dangerous. However, it - assuming proper adjustments and handling - a Government Model is NOT hazardous. They do not fire indiscriminately and capriciously at their own whim. (Read the 'proper adjustments' clause from the sentence prior.) A Government Model can be treacherous, if improperly adjusted (read the incident about Lieutenant George Patton and his dislike of the M1911 pistol) or handled.
In my life, I've had three negligent or 'accidental' shots. None of them resulted in any harm to another, happily; the only damage was to my self-esteem - even my underwear survived! All three discharges were due to my mis-handling of the arm. None were due to a pinned grip safety, none were due to mechanical failure.
'The attorney will pounce on it.' Yes, they surely will; more likely in the civil 'wrongful death' litigation.
In a criminal trial - if it gets that far - a good shoot is a good shoot. The finish, caliber, trigger pull, type of grips, type of sights and brand of ammunition simply will not matter.
Yes, there are most likely some politically motivated prosecuting attorneys in some places who will attempt to try a defender merely because the defender wasn't killed. But a decent shoot will not result in a conviction.
The following 'wrongful death' suit is far more dangerous. The plaintiff - the survivors of the late attacker - will try every sleazy stunt to sway the rather ignorant of reality (their attorney will work very hard to impanel a jury sympathetic to the plaintiff) of the hideous tragedy which is all the fault of the respondent.
One will be sued for being alive and the attacker being dead or wounded. A pinned grip safety is the least of one's concerns.
Okay, I've turned this into a small book.
I see no value in a grip or magazine safety.
YOU should not do what you overwhelmingly feel is dangerous.
You are all big kids, make up your own minds (unless you carry an issue gun, of course.)
You are all big kids; someone else who differs in opinion does not lessen you as a human being. Of course, if that 'other' is a politician, they'll try to lessen you.