Board Thread:Wiki discussion/@comment-28016818-20130206090716/@comment-5045559-20130206160225

Why not some flagging system? Everyone flags comment that seem outdated, and then a mod just checks the flagged ones and deletes them if appropriate. Saves the mod the effort of looking through all pages to find them.

If time based, i'd say a year and a half. 6 months is pretty short.