It's a setting available on the page you get from clicking on your own username.

Whoa. A website that cares about its users enough to _easily support limiting access to itself_?

That's so refreshing in terms of being a user-focused feature, and yet it stands in sharp contrast against today's engagement-hyperfocused climate. I never would have thought to look on a website's own settings page to limit my access to that same website.

I love it, thank you for pointing me to this!