Cisco AnyConnect's "Umbrella" service is monitoring all web traffic on my PERSONAL computer, even when the network service is not active: wtf?

My school/work requires me to use Cisco AnyConnect to access any programs on their network. They do not provide me a company device, so they make us install it on our personal devices. This was all well and good until recently, when either Cisco forced their "Umbrella" service into AnyConnect, or my work added the Umbrella service to AnyConnect.

I was trying to access one of my personal sites, and was met with a DNS block message with the logo …

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