Yeah, this makes opting out my responsibility. If a company collects the names of all the files in my home directory, it's my fault for not setting some random variable correctly. Oh, and you did remember to also set it in your crontabs, right? If not, oopsie! You're gettin' spied on!

This proposal is terrible and comes at the problem from the exact wrong direction. If someone wants to come up with a "export GO_AHEAD_AND_SPY=yes" envvar that enables telemetry, fine.