I think I've found myself playing one of the Anand-Topalov games; is this abuse?
Hey, these are three moves and the Catalan was played many times before. No reason to quit the game. Just deviate from the tournament games, when you think it's more fun to play something else.
And, to answer the op's question, if the "Abort" button isn't on the screen (which I'm sure it isn't) then quitting the game will cost you points. I think.