You have to be very careful what you put in your profile (as little as possible), how you set the security settings and who you accept as your "friends". IMO providing you are careful then you can use Facebook as an onlooker. You do not have to post or comment. This forum, and especially Speaker's Corner, can reveal as much as Facebook at times.
The Legend of Zelda Breath of the Wild review: Five hours with Zelda on the Nintendo Switch