As the others have said, don't do it (hard as that might be if coming from languages which do truly have scoped inner methods).

The Perl Critic will highlight this as a "Severity 5" problem--the worst. If you ever want to be humbled, try passing your best code through it (http://perlcritic.org) or the cpan version. Fixing the code so it largely passes at the "Brutal" level taught me a lot.