It's not cool to simply be tapping the CPAN because it's there.
Being cool and being effective are. for the most part, orthogonal concepts. Just ask the stereotypical 1950's accountant. :-) Speaking to the topic at hand...it it possible to become a very good Perl programmer armed with only the docs that come with perl and by having a take-only mindest with respect to CPAN. Does this disqualify that person from making informed hiring decisions with respect to Perl programmers? In my opinion, not at all.
Feel the white light, the light within
Be your own disciple, fan the sparks of will
For all of us waiting, your kingdom will come