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Rockstar Games DDoSed Heavily By Players Protesting New AntiCheat Code
(cyberinsider.com)
This is a most excellent place for technology news and articles.
There are plenty of anti-cheat measure that doesn't require invasive access to your system or performance hits. The objection is not to fighting cheating, it is with the specific overreaching methodology chosen to do so.
Also I personally rarely play multiplayer so it's even more frustrating to have bullshit installed on my system for a feature that doesn't even apply to me.