Mine are public, I used to have them members only but changed it to public as it made it difficult to check comments on my phone. I get email alerts of new comments and if I'm out they come through to the phone, and with restricted access I can't quickly check the comments as I have to log in, which is a pain as my password is not easy to remember
At the end of the day, there's nothing there except pictures of lamps and control gear etc. so hardly classified information..! Guest viewers can't see your profile or other personal details anyway.