the re-size thing doesn't really matter unless the owner of the original graphic complains or until we have a proof that the graphic has been used without permission. of course you shouldn't take graphics and resize them without permission because this IS stealing.
about the sound: I'm rather sure that they took that sound from a game (which is done with almost all sounds). it's actually not a good thing either but I also took the sounds from the original cs for cs2d so this is probably a thing which has to be tolerated
I don't think that this file needs to be removed.