I have observed it come up on a few occasions, and the law was laid down by Librarian that those who wish to comment anonymously here can do so without being badgered over said anonymity. They may be badgered on other subjects, however, as long as other rules of engagement are observed.
I don't know about a forum rule, but I wager there may be something in the law about online gambling.
ETA; Librarian beat me to it.
The Second Amendment is the one right that is so fundamental that the inability to exercise it, should the need arise, would render all other rights null and void. Dead people have no rights.
Magna est veritas et praevalebit