Software Center Default Update filter
There is a Client setting for Software Center Customization where the "Default application filter" can be set to All or Required.
I think the same option should be available for the Updates tab in Software Center.
Having the ability to configure the "Default update filter" to Required would eliminate the accidental installation of updates deployed as available.
There have been more than a few occasions when users have clicked the Install All button not realizing that they were installing an available update. It is kind of a thing when they realize one of them was a feature update.
Example of setting.