I'd consider it reasonable if there was some way to opt out, and if they made it clear what telemetry was sent - that should be in the readme, I shouldn't have

I'd consider it reasonable if there was some way to opt out, and if they made it clear what telemetry was sent - that should be in the readme, I shouldn't have to trawl through the code to find it. Note that I'm saying this as someone that generally doesn't mind providing telemetry - but they need to be clear.