The suggestion that it might make sense to have a "PM Legal Disclaimer Node" seems quite reasonable to me (although providing a link in all code posts is likely overkill.) It seems that one can be sued for almost anything these days, and a suit can cause a lot of expense and grief even if it is completely frivolous and without merit. I'm not an attorney and have no idea if opinions expressed on PM could be the basis of a legitimate suit (although I did read the Camel book at a Holiday Inn Express once), but that's probably irrelevant for the reason indicated in the previous sentence.
By the way, I've always wondered if one could use the fact that it is not generally possible to check program correctness to defend against suits involving damages related to use of software. Although I have no great love for some large software vendors, I have always felt that it's somewhat unfair to make them liable for bugs in large pieces of software (e.g. OS's) (unless it could really be proved that they deliberately released software that they knew was dangerous to the user.)
(On a related but lighter note, I've always liked the following "definitions" of software versions:
alpha version - "doesn't work"; beta version - "still doesn't work".)
chas
(Update: Actually, I don't know whether or not there already exists some kind of disclaimer on PM. Someone else can undoubtedly answer that.)