Can you lock up your disc brakes?

I don't get the big deal about not running a booster. Mine doesn't build vacuum in the chamber at idle either, but as soon as the engine picks up a few rpm, or I blip the throttle, there it is. I don't care about boost at idle because I have a manual trans, and when stopped, I don't need any boost. My booster will hold plenty of vacuum to stop the car at least once from 60mph with the engine off. But, if I slam the throttle shut in gear, the compression braking, at 11/1, works pretty good too, lol. What some guys might not know is that you can alter the assist by adjusting the pushrod length; you don't have to run it instant-on to the max, like Grandpa's FifthAvenue.