If you work in a team environment, I recommend these two books: The Phoenix Project and The Unicorn Project.

Not strictly about programming, but focuses on software projects and devops. The fast-paced novels will make your drive go much faster.

My personal opinion prefer to keep certain special interests communities less exposed to general public, ie fight club rule 1.

Is blocking a community the right approach? I think so, from the perspective of a general populous instance.