I never really got the outrage. Or rather, I don't understand why it's directed at the principle of a ring-0 anticheat.

I feel that security minded folks are apt to avoid installing software from notably untrusted vendors on important machines. If Riot ends up malicious then I'm not sure that kernel level access is capable of _that_ much more damage than what's required for a 'regular' anticheat to function. My bank account is unsafe either way. Obviously less access is better, but it feels like discussion around Vanguard always distills into an argument that would also suggest Riot's software to be untrustworthy even without a ring-0 anticheat.