Telemetry is essential thing to understand how service is used. It leads to better service for all users. In the case you mention, it should be IMO up to you t

Telemetry is essential thing to understand how service is used. It leads to better service for all users. In the case you mention, it should be IMO up to you to prevent this, probably via firewall. Having standard telemetry environment variable might be for the best. There is a risk in this case to disable telemetry systematically though, even if you want to just block it in one app, which is also not something I as vendor of many tools would want. This is probably not easy to fix for everybody to be happy. And its probably not that important for security - there are FAR easier way to deduce something about someone then to 1) hack microsoft telemetry servers or transit 2) look into the patterns of use of specific programs. Besides, telemetry data is anonymous. So I guess even in the case you get the data, what could you do with it ? I can send you billion of telemetry data of government services I make, you can only deduce that people start working at 7AM and get lots of passwords wrong before first coffee.