Does this amount to gross negligence?
hard to say who’s to blame: stores, installers or the vendor. most of these dashboards sat online for months, only 195 of 1,331 had every fix, and 76% went offline within days of the attack (disconnecting was possible all along, it seems).
Not isolating the refrigerator API from the Internet seems very negligent.
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even worse: it's grocer's negligence