Asklemmy

Here's mine, and the exact opposite of another "unpopular" opinion here which is upvoted:

Guns.

First of all pandora's box has been opened in the US and can't be closed, there's 600,000,000+ in private hands with no registry to know where/who and trillions of rnds of ammo and everyone who has any of that intends on keeping it. "American gun owners" actually end up being a larger army than most countries militaries, you're just not going to be able to short of finding a way to Infinity rock (or whatever Avengers sucks) them out of existence.

Secondly, good. I'd rather people be able to defend themselves if need be than not, be that against forces foreign or domestic, or against the crackhead down the street with a knife. All the way from the improbable fighting our government, or red dawn style fighting a foreign power on our soil, to the more likely Black Panther style activity and defending against your average deadly threats, or even just hunting for food in the event of a small/large catastrophic event that affects supply chains (if you can't get food at the store because of a natural disaster or something, at least food is walking around, it's just more work). It should never be your first resort, but you shouldn't exclude it from being your last resort.