No
As long as they either join in for the chorus or sing the bass line.
(Stone Cold Minge Binge - Wrist Deep in a gibbon, Fri 8 Apr 2005, 12:36, archived)

he just laughed
im worried... he wasnt even wearing an eye patch!
( Zenith - SAVE THE DUCKS!, Fri 8 Apr 2005, 12:39, archived)

Fair play to him
Next time hum the tune off that 'nam film, when all the choppers are swooping in over the sea.

Can't remember the name of the film for some reason, apocalyse now?
(Stone Cold Minge Binge - Wrist Deep in a gibbon, Fri 8 Apr 2005, 12:43, archived)

It was Ride of the Valkyries
from Apocolypse Now
( Nimble Colin camera-wrangling, globe-trotting whisky enthusiast, Fri 8 Apr 2005, 12:47, archived)