School making us install CA - Am I overreacting or underreacting?

Hey y'all,

I bring my own personal laptop to school. We had some problems a while back with students accessing inappropriate content, so they tightened the network filters. When I first logged on to the school WiFi, they asked us to install a certificate authority (SSL decryption certificate). I didn't want to do it and everything worked fine so I just kind of forgot about it.

This year, though, I downloaded the CA to Firefox (not my OS) in frustration …

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