Why should it matter to the rest of the league what Melbourne's crowds are? As long as they provide good competition, what else really matters? How exactly does it effect you personally?
The Storm themselves are the only ones disadvantaged by their low crowds -- if they can deal with it, then so should everyone else. i.e. shut up and worry about your own problems. Olympic Park is apparently as bad as the Sydney Showgrounds, where the Bulldogs average about 7,000, and the Bunnies struggle for that every week. The Raiders crowd average isn't far above the Storm either. But does anyone start calling those teams a waste of time?
Now, if the NRL actually did something about promoting the game down in VIC, things may change -- but then you'll probably be whinging about something else to do with the Storm, no doubt.
Melbourne wil be a tough nut to crack -- hell, it may take 20-30 years -- but once League is established there, they will be the one truly dominant football code in the country. If we give up on Melbourne, League will be as piss-weak nationally as the AFL fans claim.