Ask PG: Can we have a guideline regarding legal advice?

As we all (hopefully) know, specific legal advice is not something to discuss with the Internet for a plethora of reasons. Anything you write online regarding legal action can be used against your company, whether you run it or not. There is very real damage to be done by not being careful. However, I see too many threads where someone posts a legal tale[1] and immediately the comments fill up with this general template:

    I am not a lawyer, and this is not advice.

    That said, here's what I'd do:

I don't think people are cognizant enough of the legal consequences and ramifications as a result of a seemingly-innocuous comment like this; that doesn't just go for the person heeding the advice, there is also, in some cases, liability created for the person giving the advice.

Can we have a guideline explicitly mentioning armchair lawyering and why it's bad, and why it shouldn't be done? Please?

[1]: http://news.ycombinator.com/item?id=4055256