The third post on my network profile's top question list is currently What is a less controversial name for the clothing item known as a "wife-beater" in the United States?, and I have no way of hiding it from potential employers.
Having the phrase "wife-beater" listed front and center on my Network Profile doesn't necessarily leave a good impression when sending out job applications. I've had to removeremoved my Stack Exchange profile from my resume in order to hide it from potential employers.
I've considered dissociating the question from my account, but as user568458 points out, the post would still be displayed due to a separate issue.
While I'm not ashamed of my top network posts, when one of them is brought up during a job interview, not being able to hide them becomes a liability to my career.