08/30/2011 08:25 am ET | Updated Oct 30, 2011

Facebook Status Update Warning Rings In New Era Of Caution Signs (PICTURE)

Now that we're in the era of the smartphone, people are looking down a lot more than they used to. And we can't blame them. With 24/7 access to Twitter, Angry Birds and email, why would you look up?

Well, because now this sign's telling you to.

Also because you might fall down an open manhole or get tangled in a dog leash.

But, you know, mostly because we all respect the wishes of the "Metropolitan Etiquette Authority."

Don't let this happen to you: