I just tried to create a new synced folder with the secret string "cats", in the hope that some like minded individual had pre-populated it with cat pictures. It got rejected unsurprisingly as it's not very secure, but that was kind of the point. Is there any motivation behind this limitation beyond security? Would it be possible to relax this requirement through an 'advanced' setting to prevent people from shooting themselves in the foot? I quite like the idea of globally shared, synced folders centered around topics.