Ok, is it unreasonable to trust other people with your privacy? If you are willing to share something with 4 people are you willing to trust each of them to forward that on to the other 3 (and only the other 3?)
Or for private things do you want people to have to come directly to you to get them?
There are downsides having to do with server uptime associated with making them come directly to you that I may get into later.