Personally, I like the idea. Maybe adding some flexibility could address the points you mention.

For example, limit auto-readmore only to items in theCraft, Code, and Cool uses for Perl sections.

In Seekers of Perl Wisdom, change it by level: required at lower levels and for Anonymous Monk, reminder only for higher levels (maybe none for saints).

For mostly-text areas like this one and Meditations, don't use it at all.

I really don't know how much work it would be to add this level of flexibility. Is it doable at all?