I just had a case of professional darwinism from a coworker I actually liked. She IS very young, but that doesn't excuse the stupidity, unless she was trying to get fired. That is a possibility as she has been more and more dissatisfied with her job, so she may have been trying to get fired so she could get unemployment while looking for a new job and not having to work this one... but otherwise, way too stupid.
I work at a call center, and we handle confidential information. Not everything we handle is, and very, very little is financial, but we have security rules. One of those is no phones/devices out on the call floor. Especially NO pictures at all. Well, this girl took a picture with her phone, and then posted it on Facebook. By the way, she has coworkers as friends on Facebook. Taking pictures is an automatic firing, no warning. We'd loose our contract for the call center if it wasn't. So... Facebook strikes again.