achieving my real goal:
Helping less experienced Perl developers avoid pitfalls that would lead to hard to understand issues
Suggest you perform some detailed code reviews with your inexperienced Perl developers and write items found during the review on a wiki page, especially noting issues that crop up often. That way, you grow your list of common pitfalls over time based on real world issues in your environment. You may be able to evolve this into a code review checklist.
Detailed reviews take time, so I normally run beginner's Perl code through Perl::Critic before the code review.