10 Careers Derailed By A Tweet (PHOTOS)

These days, you have to be extra careful what you say on social networks. A single message could jeopardize your career in an instant.

Many have been fired over Twitter and canned over Facebook, but only a select few make the high-profile list below, sending hugely controversial tweets that put their careers in disarray.

Of course the latest major Twitter debacle has involved Anthony Weiner. But AOL Jobs reports he's far from the first to misfire a tweet and face an unstable career as a result.

[Weiner's] congressional sabbatical may very well culminate in his departure from Congress. This is America, and at 46 years old, Weiner still has a future as something. But as the most famous Twitter casualty to date, his experience reinforces the lesson that all tweets might as well be seen by your boss. In his case, that's the American people, and public opinion.

Here are 10 notable cases in which a career was severely damaged by a tweet. (Of course, Twitter can be used the opposite way too.) Each of these mishaps could have been avoided had the tweet deliverer simply avoided hitting "send" on such a public forum - Twitter.