A scalper is not a parasite, he is just allowing the market to reach equilibrium by bringing a good's price up to its true market value. If rich people think an iPad is worth 2x as much on the first day, than shame on Apple for not pricing it higher. [EDIT: I just remembered they actually did this with the first iPhone] "Scalping" is actually a well-established economic concept called arbitrage that is an actual value-added service, it helps match producers and consumers between markets with price disparities.
As other posters have noted, this is basic to capitalism, Western companies buy cheap goods from China and then resell them at a higher price, making a profit. Are you saying that international trade of that sort should not exist and that people are being scammed by not buying stuff cheaply from the manufacturer in China? Or the oil well in Kuwait?
Scalpers are not bringing the price of an item up to its true price. They are creating an artificial demand bubble from buying up available items with the intent of creating a shortage.
While I really don't care one way or the other, we have to call it how we see it. Scalpers or speculators will never dictate a true price, because true price is averaged over the life of the product.