Actually, at the time I left for MacPorts, "brew analytics off" wasn't an option. Analytics was turned on without warning and without any obvious way to turn it off. They added an environment variable but still left it opt-out (on by default). I disagreed but users who complained were told that the decision was made and no further discussion would be allowed. [1]
> If you feel that way: please use another package manager.
I didn't like how it was handled. I think any sort of analytics, especially by third party companies with real capabilities for correlation and de-anonymisation should be strictly opt-in (off by default).
Opt-in doesn't really hurt users who don't care about privacy and security. Opt-out does hurt users who care about those things. Many organisations have security policies that discourage using software that "calls home". I'd trust the software much more if it didn't have that functionality at all.
The developer's justification was that if it was off by default, no-one would turn it on. I think that speaks volumes about how users feel about analytics these days. Some users suggested a Debian Popcorn style dialog ("We'd love it if you could help us gather some information about package usage, etc etc. Would you like to participate [y/N]", off by default but a question on first run asking the user if they'd like to help). We were told "no".
Overall, I thought it was a bad idea and the situation was handled poorly. For something as integral as a package manager I expect more.
[1] https://github.com/Homebrew/brew/issues/142#issuecomment-214...