in reply to Maintainable Code?
If you are using well-documented code, then I see no problem with including "grown-up" Perl concepts. You might want to include a reference in the comments to a book (complete with page number) or website (Perl Monks?) that will explain the "grown-up" Perl concept you are using.
If you continuously dumb down your code, then how are they ever going to grow up as a Perl programmer?