a.k.a. #googmayharm
At first, I thought I had been hacked:

Then I thought maybe Drupal sites had been subject to a mass hacker intrusion:

Then I realized it was actually a bug with Google:

Clicking on every search result gives you a scary looking error:

The bug is widespread enough that their "Safe Browsing diagnostic page" is crashing:

When you get through, it says "Site is listed as suspicious - visiting this web site may harm your computer." But the rest of the information doesn't

It seems to be fixed now, more than 40 minutes later. One wonders how much that little episode cost Google.

About google mayhem
That was an unexpected one..