Well, it seems the man mentioned in the news story has died. Yet another needless firearms tragedy. The idea of simply tossing a loaded gun into a bag, any bag, is one I'm not at all comfortable with. I have no idea what type of firearm was involved, but as stated above, it likely wasn't holstered, and - I'll go out on a limb here - if it happens to be a striker-fired pistol with no manual safety, then tossed, chambered, and unholstered amounts to gross negligence, as far as I'm concerned.
Not that it ever was acceptable, but being cavalier with firearms in this day and age is reprehensible. Every incident like this one has far reaching ramifications. I don't care how busy you are, how important you think you are, how much your time is worth, or how good you think you are with a gun, you must take the time to be safe and you must consider the consequences of not doing so.
Perhaps, with a just a few extra seconds spent on precaution, this man would still be alive. Sad, truly sad.