The difference is in the effort required to moderate the content. An /r/trees worst case scenario is two people meeting up to perform an illegal activity at a l

The difference is in the effort required to moderate the content. An /r/trees worst case scenario is two people meeting up to perform an illegal activity at a later point. An /r/jailbait worst case scenario is illegal material being indexed by the site. Additionally, /r/trees isn't generating hundreds of flagged threads for review by the admins (who are then forced to spend man hours browsing pictures of under-aged girls).