UG, I think the answer is yes. You don't have to be "friends" with anyone to view and participate in the Seafarer Yacht group. We now have over 80 members in the group and I'm friends with only a few people. If you decide to set up a FB account, you can limit your exposure. For example I have my profile set to NOT receive email notification about anything. If I want to interact on FB it's when I log in.
For the record I think this Sailnet forum is excellent. Frankly, the old original Seafarer network started on this site over 10 years ago, but it has limitations. Seafarer Research Group web site is also one of the original sites used by Seafarer owners, and it is still a good site, but not updated frequently, and much more difficult for members to exchange ideas that Sailnet or the FB Seafarer Yacht Group.
I suggest trying the FB Seafarer Yacht Group and if you aren't pleased just delete your account. Whether on Sailnet, Seafarer Research, or the FB Seafarer Group I certainly look forward to your input.