Board Thread:The Wiki Tavern/@comment-66.249.93.45-20140909161824/@comment-25085701-20180715214716

For #2: I've actually run a challenge for a guild a number of times. You can set the tasks in the challenge (but not checklists), and you can see when people in the challenge check them off and track individual progress through the challenge, but you can't unclick a challenge for them if they 'accidentally' click it.

I think that's fairly close to what you want?