If you want to know which Go modules I use, go check out my github. They're listed right there in import statements. If I'm hacking on a project that I want to keep private, I'll disable this feature with a command line flag - easy.
My issue with the paranoid folks in that thread is not that they made no sense (they can't help that), it was they were attacking the person who implemented the feature viciously. He had implemented a feature that a majority of Go developers had been requesting for 5+ years, had done it in a way that improved clean build time, improved security and could easily be disabled or replaced with a private DB. Literally what else could that man have done?
Even though all his work could be verified trivially (Go is open source!), they still chose to attack him.