In the US around 1 in 1000 people will murder someone in their life. So if you scam a million people then on average you scam around 1000 murderers. Getting death threats when you make that many murderers angry should be expected and actually getting killed is not out of the question. This is not a problem with the gaming community, this is a problem with society in general.
Killing someone is of course illegal, but I wouldn't go around taunting murderers unnecessary anyway. They are provably irrational so them getting punished wont stop them while I would still be dead.
But the vast majority of murderers know their victims and have some kind of relationship with them - spouse, significant other (at least at some point), drug dealer, relative of a victim, whatever.
"Video game customer" is not on that list.
We can't control the crazies. They will always be out there and it makes no sense to focus only on them every time they pop out of the woodwork.