They don't need to crack down on anything. This is the basic law of supply and demand.
Now, personally, I would limit them to fewer than 5 (or even fewer) instead of 10 if something is a limited edition, but that is up to Disney, not me.
By making limited editions, you are necessarily creating collectibles. Those, by nature, increase in value. It's no different than stamps, coins, baseball cards, or records.
Part of the reason these items are desirable at all is because they will presumably increase in value. Part of the reason to justify buying them is because they are expected to at least maintain their value, or be left as a collection to grandchildren, etc.
There are people who make a living doing what has been termed "retail arbitrage." They go to Walmart's clearance section and buy Lego sets to sell on eBay for a higher price. Nothing wrong with that at all.
The only way to partially avoid this situation is to make more, which is entirely within their capability. Still, there will always be temporary shortages, and in the "buy it now" internet world, prices go up until supply gets back to normal.
You don't think Tom Petty music has gone up in value overnight? That's not scalping. That's catering to a collector market combined with the law of supply and demand combined with entrepreneurship. There's going to be a temporary spike across the board as supplies at retail quickly sell out. Then there will be replenishment from the warehouses which will also sell out. Then prices will remain above normal until more are repressed. Then prices go below normal when the market is flooded. It's not a safe bet by any means.
Finally, if someone with an AP wants to go stand in line for 3 hours and lay out their cash (plus what they paid for that AP) I can't fault them for being compensated for that 3 hours, and I'm certain there are those who appreciate not having to fly to WDW to stand in line for 3 hours, because buying one on ebay for double the price is still a lot cheaper and easier.
I get the personal disappointment. And I would fault people who don't follow the rules (and buy 20 instead of 10.) But I'm not going to fault folks dealing within Disney's parameters and taking the personal risk to sell them on ebay, which can result in returns, lost shipments, dropped prices, etc. I'm certain there are folks who live in the area who make a living this way.