"If you do that, ideally, a small gnome climbs out the back of the computer and hits the developer with a mallet." (various bits of perl IRC have adopted the m

"If you do that, ideally, a small gnome climbs out the back of the computer and hits the developer with a mallet." (various bits of perl IRC have adopted the mallet gnome as an idiom over the years and it seems to convey the "please don't" point without being overly combative ;)