I'm surprised by the negative takes... Yes, proxies are good. Ones which you pay for and which are running legitimately, with the knowledge (and compensation) of those who run them. Malware in random apps running on your device without your knowledge is bad.
> Malware in random apps running on your device without your knowledge is bad. And ones that have all the indicators of compromise of Russia, Iran, DPRK, PRC, etc
And when Google say
"IPIDEA’s proxy infrastructure is a little-known component of the digital ecosystem leveraged by a wide array of bad actors."
What they really mean is " ... leveraged by actors indiscriminately scraping the web and ignoring copyright - that are not us."
I can't help but feel this is just Google trying to pull the ladder up behind then and make it more difficult for other companies to collect training data.