I’m looking for a summary of what userlevels have what abilities to edit tags. I would like to give subscribers the ability delete tags as well as add. Is there a switch I can throw somewhere in the config file?
It’s not in the config that I know of, but you can look at bb-includes/capabilities.php and find 'edit_others_tags' and 'edit_tags' – I think you could edit the capabilities to allow members those two functions. I’m not sure if there’s a plugin that allows the same thing or not. That would be a modification to a core file which is a bad thing in general. You lose that modification if you ever update your bbPress installation.
I would not take my advice to edit capabilities.php and would instead look for a plugin that will allow you to change the capabilities of a member.