Proposed: Old accounts which haven't been used in {insert arbitrary time period here} should be deleted/expire unless the account has created at least one exising idea.

This idea attempts to overcome the technological bias of a given 'generation' of HB users: What was impossible and fool-hardy or silly a few years ago maybe possible tomorrow. The longer an idea exists, the harder it may be to overcome it's record because non-returning 'Bakers won't be around to change their vote. This also negates the effect of bozos (sorry [beauxeault]) posting inane ideas and having their friends artificially inflate their croissant count. The idea itself would still stand, but would sink in rank over time. The reverse is true as well: Spiteful (and artificial) negative votes would eventually drop off.

HalfBakers without posted ideas who want to take a hiatus longer than {insert arbitrary time period here} could inform a moderator to have their account protected.