Thanks for your reply @HAWK. Yeah, like I mentioned in my story, I'm the Sr. UX designer at Experts Exchange and they are doing the Q&A in tech area for almost 20 yrs now. I was working on some new projects and I thought it would be nice to share my question with this community
How do you feel about the Instagram tactic? They kinda have the advantages of both system, so they are still letting people follow and being followed, but they give users the option to make the follow access limited and wait for their acceptance, in case if they want more privacy.
To be honest I'm not a fan of either one and as you said it depends on the kind of the community, but I believe Instagram model satisfies those who have reasons to be private.