I just noticed I can't tell who is actually still playing and who has left the game in the drop-down menu. I know it tells you who leaves the game at the time, but it there any way later in the game to see who is actually still playing the game and who has left?

Also is there any way to deny creeps or towers? These may be stupid questions.

I feel creep denies are an important part of the game, not to mention tower denies. I feel if we want DotA players to make the switch to LoL, we should include those small points of strategy.