It's actually something I'm quite careful of, not so much the personal details available but what I say about things. I work in the gaming industry and as such I may talk about games or gaming on my site, but I won't give opinions on it. If I were to post saying for instance that I thought Call of Duty 4 was the most awful game ever released, and we were doing a promotion for it, I would possibly end up in trouble at work. There have been cases fairly recently of people being fired on the spot for gross misconduct after saying bad things about the fields their company works in, not even the company itself, just the field, on their personal blog.
It's not awful by the way, awesome game, I'm just using it as an example.