Would you post your bank account or credit card number? The password to your e-mail? You're not as anonymous as you could be or think you are, and I strongly advise against it. It's not the people on the other side of the world that you have to fear, but more likely the people closer to home, who overhear what you're up to and use it to keep tabs on you. The most important part of burglary is the gathering intel, and the time of be forced to walk through the neighborhood to find it is long past us. Call me paranoid (which is true to some extent, I'll readily admit), but I'd rather be safe than sorry any day.
Let me put it in another way: I sure as hell am not going to post the days that I will not be home on a public forum, and if I find out someone's been doing this on my behalf, I would be seriously pissed off. Not that I expect any of you would do this, but please keep in mind that I'm not the only one who thinks like this - you don't have to agree, but I hope you realize that this can be a pretty big line to cross.
I'm sorry if I sound like an asshole about this, but yeah, I really _really_ think it's very stupid.