I hate it when they spam draw requests. The last time this happened my opponent gave me a free knight in the first few turns, so for the next 20 or so I had to deal with a few draw offers a turn.
Any ways, about the pawn promotion, I always see it as their inability to checkmate. Like this sort of thing:
Most like the person playing black made a stupid mistake earlier and dropped a piece, but missing the checkmate(s) seems to be far worse.
What is achieved by playing on here? It's nothing to do with learning from the winning technique because it takes none.
http://www.chess.com/echess/game?id=61000890