I'm slowly releasing (which takes a good bit of time) a bunch of my older/smaller plugins that have just been sitting around and others might want them. By now, some of these may have similar plugins released by others - I don't intend on checking. I think this one may have been a part of other plugins at some point, but this is available for those that want it stand-alone.
TOG Admin Targeting
Adds @admins and @!admins targeting methods based on flag 'b'.
e.g. you can target sm_slap @admins to slap all admins, or sm_slap @!admins to slap all non-admins
See Github repository for plugin details and instructions.