I regularly see one of these in a co-worker's code:

sub blah
{
  my ( $foo, $bar, $baz ) = ( shift, shift );
}
[download]

Perhaps not too bad in a short list of shifts. But terrible when invoked as:

shazam ( 0, 6, 7, $index, $arrayref, $hashref );

...

sub shazam {
  my ( $foo, $bar, $baz, $bup, $quz, $pig, $cow ) = (shift, shift, shi
+ft, shift, shift, shift);
}
[download]

Quick, was $cow passed in via @_ or simply instantiated?

update: added another egregious example, shazam

blyman
setenv EXINIT 'set noai ts=2'