They're a little distracting but so are billboards. And while people shouldn't take pictures while driving, it also makes the sign way more effective if people share it or talk about it.

I'd argue it's gotta be a net positive over having repeated generic messages no one pays attention to.

I went backpacking in Kings Canyon and it was truly the coolest long trail I ever walked in my life. So much variety going over these cold rocky alpine environments and back down into these beautiful forests, valleys, and past lakes. And all of it practically untouched.

It's so irritating how many people think you're slow just because you're leaving a safe amount of space. When you're actually traveling at the same speed as the car in front of you.