I rather think that all code that is posted here can be considered public domain unless stated otherwise - Perl offers us the possibility of creating non-GPL-infected source at our choice and I would find it a bad idea to infest stuff that is posted on Perlmonks with the GPL.

I know that the GPL is hailed as the saviour of Open Source (or was it Free Software) in certain circles, but I still think that Public Domain still offers the most of freedom to the user of the code - and that's what Perlmonks is about (IMO) - helping other people, and not pushing another persons (Perl-unrelated) agenda.