Frankly, it's long past time we had "anti-cheat" available for the web. People vastly underestimate how bad "web cheaters" are for society. They drown search engines and social networks with spam that advances interests for a tiny minority. Places like Reddit are flooded with astroturfed misinformation. They are not as obvious as cheaters in a video game, but far more consequential.
There are obviously a lot of details to work out, but pretending that this is just a power grab by Apple, Google et al. instead of an attempt to address an extremely serious problem (that HN indirectly complains about all the time, e.g. "web 2.0 sucks", "why are search results so bad now"), is just naïve.