Not defending Marriott, but the primary use case for rogue AP mitigation is not fueled by corporate greed. I recommend it to clients to keep employees from standing up insecure AP's on their internal network, which is a serious security concern. I encourage you to write the tool, though!
Many consumer routers have a clone MAC feature to address exactly this issue. A person puts their computer behind the new wifi router and clones the MAC address so it can get on the network.
