Tracking
An odd thing about tracking to stop those who wanted to isolate themselves, fail to see the issue if "crew members" want to spend time alone: Presumably there will be plenty of social interaction doing tasks, communal meals etc. but someone who is happy in their own company and does not need to seek out intearction from others does not equate to someone isolating themselves because they fear they may have a big argument with someone else: If I was given a choice between an hour of inconsequential chit chat with someone I already saw plenty of & chatted to in course of work, or an hour with one of the many great works of literature still on my "to read" list, I would take the book every time.