I'm not the most versed with networking or operating systems but I wonder how difficult it would be to program a raspberry pi to poison the datasets of these types of things. Program it to impersonate a wide set of devices and randomly respond as such in a home. Or even if it would be worth it. Maybe if a phone app could do it too that would make it easy to poison the dataset only when you purchase new smart devices while they do their heavier reconnaissance during the first few weeks (assuming Keurig and the like calm down a bit after some period of time).