Pkg.jl telemetry should be opt-in

Internals & Design
200

Perhaps a silly question that betrays my lack of understanding of the issues, but if the goal is to track the use of the components of the Julia ecosystem, why can’t the components be tied to the Julia executable instead of the user? In other words, each Julia executable would have a unique ID, and the telemetry would report usage tied to the executable. There would be no link between the user and the executable, hence complete privacy.