Let's say an exception is made this time.
Nothing comes of it.
Next time this comes up, the case is made that it's not much different than this, and an exception is made again.
Repeat, and repeat, and repeat.
Eventually the range of allowed exceptions to the rule is broad enough that the rule might as well not be there, and then someone's personal information is posted, and that person does sue.
Better to keep a blanket ban.
(Incidentally, the last time this came up was over an address from a URL ownership report being posted.)