I worry a lot more about the bottle bombs left along highways, when truckers decide that a gallon milk jug makes a good restroom. You do NOT want one of those blowing up in your vicinity, either.

And there was this incident a few years back that happened right here in Laurelhurst neighborhood. After that happened, I'm very careful picking up objects laying about.

Nice of Youtube to show a bunch of these videos. The comments are worse. One of them souds like a Portlander (whoop....)

Another item to be careful with is tennis balls. My folks live out on a semi-rural road in Gresham and a lot of crap gets dumped off the side of the road (which runs next to a Johnson Creek tributary, natch). Lots of mailbox vandalism, people pitching small to large appliances, stuff like that.

I was going out to their place to water the plants while they were out of town a few years back and saw a couple of tennis balls with pieces of duct tape wrapped around them at the foot of their rather long driveway. Something seemed a little bit off, so I didn't just pick them up as I might have done with most of the crap that gets left out there, I just drove around and called the police from the house, saying that I thought there might be some sort of explosive device on the roadway. Probably a good thing, because Snopes has a piece about tennis ball bombs with a 2000 report from Portland.

Dranos' chemical name is sodium hydroxide, a powerful corrosive. What you have here is a device that reacts to aluminum and creates gas that when confined in a soda bottle, causes the bottle to expand to the bursting point, then showering the immediate area with that corrosive substance that can and will burn you, or blind you.
It sounds like a no brainer not to do this. The sad reality is something like this will have an unknowing victim, sooner or later.
The idiots that make them.. they deserve what they get.