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Man-in-the-Middle PCB Unlocks HP Ink Cartridges
(hackaday.com)
This is a most excellent place for technology news and articles.
Luckily/unluckily (because effort), in Australia, consumer guarantees on length of time you can get a refund are vague.
E.g. it doesn't matter that a fridge's manufacturer warranty is only 2 years, you expect that to last longer.
With effort, you could probably get a fridge fixed like 5 years after purchase with some badgering / threatening small claims.
Bricking your product would probably fall under that category.
This is wild speculation, not a lawyer.