Allows network admin to globally disable certain widgets.
Allows network admin to globally disable default or custom widgets.
Very simple usage - setup via Network Admin -> Themes -> Disable Widgets.
Developed for private use, but has perspective for more extensive usage. I can't guarantee any support in the future nor further development, but it is to be expected. Kindly inform me about bugs, if you find any, or propose new features: firstname.lastname@example.org.