Last week I was at a trade show in Las Vegas chatting with some fellow vendors about Facebook. The guy I was talking to at our booth “doesn’t do Facebook” and I understand why. I mentioned that someone in my list of Facebook Friends had been going through a public meltdown, describing intimate details of her broken marriage and fighting with her husband on her page. I had told this person the last time she did it to knock it off. Facebook is not your diary, and it could jeopardize your career. My co-worker at the trade show, a magazine publisher was listening in but had no comment.

A few hours later, the publisher I was working with asked me if I would like to sell advertising for her online magazine, which I had to decline because as a journalist, I tend to keep those things separate. Plus, it was a kids’ magazine, a target demo I know little about. That being said, I started to tell her about someone I knew who would be perfect. “This woman could sell sand at the beach,” I said, and I mentioned she had experience in broadcast advertising and had several kids of her own. She was looking for a work from home job. The magazine publisher was interested, but then I had to tell her the God’s honest truth. The person I was speaking about was the same person I spoke of earlier who was trashing her estranged husband all over Facebook. “No thanks,” said the publisher. “It sounds as if she has no boundaries. But thanks anyway.”

So there you have it. Just because you have a lot of friends on Facebook, and you think your page is private, it really isn’t. And if there’s one particular thing I learned at this convention is that “we all have a brand, whether we want one or not.” Don’t let your brand be tarnished by a foolish rant on Facebook. Every day is your job interview, and you have no idea how many opportunities are wasted because or your own self-published comments.