Modifying your pistol is pretty cool especially for accuracy shooting, competition shooting, hunting, etc or just because you want to. Licensed carry guns with modifications come with some potential risk and it's up to you to decide if it is worth the risk. If you use a handgun to protect yourself, even if you are justified, you are likely to defend yourself in court as well.
Guns with by-passed safeties and and lightened triggers are more the exception than the rule, so that could explain why there may or may not be no lawsuits involving them. However, a modified gun for legal carry is putting yourself at
unnecessary risk. Modern handguns will do the job it needs to do, you'll have enough trouble justifying why you had to shoot the pistol at all.
Over the past few years I have taken a lot of defensive pistol training and every time the instructors said modifying safeties, triggers, etc is not a good idea. It is best to keep you carry gun in its original condition. So this opinion is not just mine, but of other more experienced and knowledgeable people.
Here is some more information:
https://www.uslawshield.com/legal-risks-of-modifying-your-trigger-pull/
https://www.armedcitizensnetwork.org/gun-modifications
https://americanhandgunner.com/understanding-hair-trigger-issues/
http://www.usafirearmtraining.com/safety/should-you-modify-your-trigger-on-your-carry-gun/
...I have yet to see or hear of any case where a pinned grip safety on a 1911 has played a part in a case against anyone....
I am talking about modification to the operation of the gun that affect the shooters performance, so that would include by-passing safeties and lightening triggers. Just because something hasn't happened doesn't mean it's not going to happen. Given the intensity of gun issues and the vultures in the legal system, I will advise anyone to keep the gun stock. Instead of pinning a 1911, carry a pistol that doesn't have a grip safety.
As we all know, the best way to win a gun fight is to avoid it. Logically, the best way to win a lawsuit is to avoid being sued.