Well, there may be other regulations such as warranty voided, etc that manufacturers can do on their end. This is why 'authorized distributor' is a clause in a lot of warranty agreements.
You know, I don't know why I didn't remember this, but there IS something that can be done legally to hurt scalpers. Technically if they are operating as a business, they are doing so without a business license, and are not paying income tax on the sales which technically they would need to do since there is a gain. One way to limit these type of issues is to only allow personal accounts a certain dollar or transaction value before one needs to be a business account, and anyone circumventing such rules is permanently banned. And then these rules would need to be enforced, which is highly unlikely since the platforms benefit from the transactions of violators. But then the platform should be held liable for being a 'place' that harbors illegal activity since this would be no different than a physical 'trading house' that would allow goods to be illegally transacted--such an operation would be physically shut down.
Most TOS agreements specifically address automated transactions as well as circumventing security--but enforcement is always the issue (as it is in the third world that has all the same laws on the books as the first world).
Well said on the predatory tactics--and unfortunately it seems as if the law is being bent even more and more to allow such activities in the name of 'progress'--banking regulations, credit card security, personal information privacy all are LESS secure than they were 10 years ago.