I work in DC and I can tell you for a fact that Clinton would ride around in the presidental limo with the light on inside so everyone could see him. The only president I ever saw do that.
Not only that, but during a LARGE anti-Clinton protest held in Port St. Lucie, he showed up with five or six black Excursions flanking the pres. limo in front and back, AND he left the light on so that we could not only see him, but he couldn't see us (it was dark).
He did, however, HEAR us as we loudly booed him!