On: macOS High Sierra: Anyone can login as “root” with empty password

[tempay]

By default no as most people expect things to keep running when they lock their laptop.

There is a setting to immediately destroy the key when the laptop sleeps. It might be outdated but [1] should give you a starting point for setting it up.

[1] http://mattwashchuk.com/articles/2016/01/08/maximizing-filev...