1. I've had to wear bulletproof vests, and now choose not to because they are a massive pain. So that's why I felt like I should explain why they aren't a good solution. They won't be of any help in the majority of cases, and will likely slow you down. Unlike the ABS example, the amount of help a vest that would fit underneath your typical clothing is so small that it would be next to useless. At the distance you'd have to be from a shooter in order for it to be effective against a round it isn't meant for, the reason you'd survive is because they can't accurately aim at you. Anywhere within reasonable accuracy distances, it would be worthless. Most individuals aren't going to be accurate with a pistol past 10-15 yards, well within the range that a 9mm, .45, .40, etc. are effective against level I or level II armor.

2. You're right, I looked quickly and it looked like you were replying to MrVilliam's post, where he said he was afraid the locals would leak his home address. Obviously, on a re-look, that's not the case. So... oops.

3. No. Concealable guns (handguns, for the most part, leaving aside the ridiculous sweatpants video) easily penetrate all but the best armor. The Ft. Hood shooter, for example, used a pistol that was chambered in .223, the 'civilian' version of the 5.56.

3b. Also, yes. While I wouldn't want to use a handgun against a rifle or shotgun, I'd still much prefer to have one, especially in the situations where the majority of shootings happen. It wouldn't help at all in the Las Vegas shooting, but in the rest? Schools, grocery stores, large chain stores? A pistol would work well. The range you'd be engaging the shooter at will likely be within those 15 yards that people can accurately aim a handgun. That kind of carries into your last, unnumbered point. Right now, non-lethal (which should really be called less-lethal, but that's a whole thing I personally roll my eyes at) options don't have anywhere near a large enough range. The longest Tasers reach around 40', I think, while the 37mm or 40mm bean-bag shooters are never going to be carried around by a civilian casually. The taser almost certainly won't be effective at that range. I think it's an 8 degree spread between the two probes, which works out to about 1 foot of spread every 7 feet of distance to the target. At the maximum range of 40', that's nearly a 6 foot spread. A taser isn't going to be super accurate either, so you'd have to aim for the head and get lucky, and also get lucky that your nearly 6 foot spread of the barbs hit the other guy's foot. Otherwise it isn't going to be very effective at stopping the shooter from shooting you.

As an aside, sure, I'm an American. I think I'm pretty logical about everything, though. I think societies that don't have guns outnumbering folks are great and wish we could get there. I also think that we've gotten ourselves into a shithole, and it is at the point where the first person to disarm is fucked. It's just like this stupid nuclear weapon situation. Can you really imagine America, Britain, France, etc. giving up their nuclear weapons after seeing how Russia is acting? That's what it's going to be like for at least a decade if we vote now to get rid of civilian ownership of guns. 'The Purge' wouldn't be a good depiction of what it would be like, but I don't want to wait 30 minutes for the police to come help when my meth head neighbor decides to get revenge for all the 'slights' I've ever given him (like asking him not to dump his tires and burn them next to my chicken coop because he thought it was funny) with his little dump gun in hand and here I am having turned over my guns to the sheriff.