While pinning a grip safety was once a popular mod, in truth it was never really necessary. It's possible to tune a grip safety so that it still works, but is disengaged with just the slightest amount of pressure on it. It's easier to do than drilling it for a pin anyway. I personally think the folks pinning safeties are mostly paranoid about safeties to begin with.
I'm willing to give guys like Charlie Miller a pass though. He came from an era when it was also fashionable to remove the front of the triggerguard on a revolver. Nobody worried about ND's back then because cops usually worked alone without any means to call for for backup, and having a gun that would fire no matter what was more important than worrying about whether or not there was a personal injury lawyer peeking through the bushes.