I took an econ class long ago, and the prof absolutely loved scalpers. He would argue that they help determine the true value of the product (at the margin of course). Obviously, this doesn't provide comfort when you are the consumer that is priced out of the thing you want, but the concept is interesting.
Frankly, as long as scalpers are not involved in products that are a true human necessity (water, food, shelter, medicine and such), then they should be eligible to run their game. It's an inconvenience when something you want is scarce, but as long as it isn't something you need, it doesn't make the scalper morally wrong.
I won't stand in the way of companies putting in policy to limit the activity though. It's well within the right of the seller to try and combat the practice, if they want to.