Murderball? It's murder all right!

Why on earth is wheelchair rugby called that?  OK, they're in wheelchairs, but rugby??  It's not rugby, it's basketball without the hoops!  They don't use a rugby ball, and they ignore the basic rule which makes rugby what it is - that the ball cannot be passed forwards.  As far as I can see, the only similarity with rugby is that, in order to score a point, you must carry the ball into your opponent's end zone.  I feel like complaining to the Advertising Standards Authority!