Yes, in a scenario where Kaspersky has decided they want to target you and they are intent on doing whatever it takes, killing the information flow to their cloud won't save you. Kaspersky could try to get at you via special payload in their client software, hacking into your systems some other way, or asking the Kremlin to take care of it. Maybe if you are lucky they'll send someone sultry to seduce you! How about a different scenario though. Where Kaspersky simply processes the information that flows into their cloud, sharing anything that looks interesting with the Kremlin? Or one where the Kremlin has an operative within Kaspersky that grabs what they can? In those scenarios, killing the information flow to their cloud could save you. Here I'm sticking with the Kaspersky/Kremlin scenario, but I personally don't consider that a special case. Various other combinations are equally possible IMO. Including NON-state actors trying to blackmail or otherwise exert control over security vendors, cases where the ultimate beneficiary is a corporation that is using government connections to get at competitor information, etc. Joe Nobody *might* not need to worry about these types of things, but there are many people who do.