“ ...And Saint Attila raised the hand grenade up on high, saying, "O LORD, bless this Thy hand grenade that with it Thou mayest blow Thine enemies to tiny bits, in Thy mercy." And the LORD did grin and the people did feast upon the
lambs and sloths and carps and and orangatangs and breakfast cereals and fruit bats chu... "I'll skip a bit, here"... And the LORD spake, saying, "First shalt thou take out the Holy Pin, then shalt thou count to three, no more, no less. Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number, be reached, then lobbest thou thy Holy Hand Grenade of Antioch towards thy foe, who being naughty in My sight, shall snuff it." Amen.
Oh wait, wrong page.
Let's see. I must say that I have yet to see a set of rules on that. It doesn't mean that it doesn't exists. Personally I try to give as much latitude as I can. I also think that D & T is great at self policing. Don't you think?