OK, this one is on a completely different scale than SoGen's issues this past week (see below). A woman sees an ad online for an administrator at the architecture firm she works for. Thinking her employer is looking to replace her she goes in to the office in the evening and maliciously deletes millions of dollars of CAD files. Of course the company had backups, no one is that dumb, but it sounds like she created a lot of hassle the next day. What was dumb was allowing anybody to have delete authority on those files.
But think about it. Could anyone do this in your organization? Do you actually trust your employees too much? The most common instance I run in to of computer threat is the insider jack-of-all-trades IT guy at a small business.
The reason I categorize this story under "stupid criminals"? Turns out the ad was for a position at the owner's wife's business. Oops.