As businesspeople incorporate social networking sites into their marketing efforts, they don’t have a lot of guidance that’s based in experience. Netiquette changes so rapidly that today’s faux pas might be perfectly acceptable by next week.
I do think some things are timeless, and one place it pays to be careful is blurring the line between your business and your personal life. Posting information that’s too personal or that has the potential to offend can cost you business. It’s been that way before Facebook was invented, and my guess is that it will always be.