The server knows your device, not you
Taking part works with an account: e-mail address and password, nothing else. No other member sees your address. All that is visible is the name you give yourself and your PC.
Your device gets a random identifier, and the server holds only a check value of it. The log against faults shortens the internet address and is gone after 7 days.
Under "Meine Community" (My community), "Was der Server über dieses Gerät weiß" (What the server knows about this device) shows you everything stored there, and "Aus der Community austreten" (Leave the community) deletes it at once.

