> I don't want one process to be able to decide that it's windows should be higher priority than another process, or see what's displayed on another processes w

> I don't want one process to be able to decide that it's windows should be higher priority than another process, or see what's displayed on another processes windows, or steal keystrokes from windows owned by another process. The traditional, greybeard way to deal with a misbehaving application is to stop using it. This “security” approach breaks all other applications instead.