Armor costs money and it's heavy. If armor piercing rounds become common, it's a total waste. It's pretty ridiculous that we are having this conversation about civilian life. What the heck is happening in this country?
As someone who isn't buying armor, it in no way hurts me that it's expensive and heavy, but every dollar they spend on armor or weapons to specifically fight people wearing armor instead of a dollar spent on weapons meant to kill people like me is an improvement. I won't say it's smart to buy body armor, it isn't, but it's still in my best interest to encourage the whack jobs to waste their money.
I would consider switching from weapons designed to be used against any innocent person to weapons designed specifically to deal with those looking for a fight to be de-escalation.
A better de-escalation would be to reduce the number of and need for weapons as well as counter hate speech and radicalization. I don't think body armor is going to do the trick, frankly.
(aside: this conversation has jumped the shark IMHO, so this is where I'm getting off. peace, literally)