I've got a simple suggestion. By the Seekers of Perl Wisdom form, include something to the effect of:

And maybe include some greatest hits, like floating point round-off problems, on Q&A's top page itself, not just in the categories.

This isn't any sort of attack on people asking the floating point question in particular, or FAQs in general. It's not even meant as a global criticism of redundant questions -- redundant questions are great when the previous answers can't be found. New questions and answers might better correspond to a future searcher's keywords.

If these links head off even a few questions, everyone wins -- the seeker gets a faster answer, SoPW has a higher signal:noise ratio, and there's reduced opportunity for the Monastery to get a reputation for being beginner-unfriendly through a gruff RTFM response.