If all modules must end with a true value, then why not use a statement that carries a positive message which encourages true, positive values.
For example:
'Eat more leafy, green vegetables.'
As long as there is this requirement for a true value at the end of the module, it may as well carry a positive message to the reader.
This gives a new meaning to if you don't get the documentation, your code is broken.<< '=cut';
=head1 NAME -- Bla Bla
...
=cut