The Criminal Code, R.S.C. 1990, c. C-43, s.71 forbids dueling whereas it states:
71. Every one who
(a) challenges or attempts by any means to provoke another person to fight a duel,
(b) attempts to provoke a person to challenge another person to fight a duel, or
(c) accepts a challenge to fight a duel,
is guilty of an indictable offence and liable to imprisonment for a term not exceeding two years.
Accordingly, it appears that Steve Martin and the Muppets should be criminally charged with the offence of engaging in a duel!