Why didn't L wear a mask?*Spoilers*
Maybe it's because I just watched Darker than Black again, but why didn't L wear a mask when working with Light and the others? The name wouldn't have really mattered then, since Light would never have actually seen L's face.
I'm making my way through the anime a second time after it's been a while, so I don't remember the exact details of L's death(the other death god gave light his name, right? Or did she kill him outright?). But seriously, throw a mask on and make SURE 'Kira' couldn't kill you.