This kind of push is only going to make people want to disable telemetry even more. Privacy is sacrosanct and should be accepted as the norm, not something we need to opt-in.

Go already has some form of telemetry built-in (by way of a google proxy, I suppose) and adding an official one that is opt-out is just going to make me refuse to ever work with it.

Telemetry should always be opt-in, and only opt-in. We have so much issues with telemetry, privacy, and such because the big players and corporations insists opt-out is better (maybe you get more data, but you violate end-users trust as well). Is that really worth it?

There is blow-back and distrust in the industry as a result and it's only going to get worse the more you try to push for opt-out telemetry (or just assuming telemetry should be the default).