Mine is un-plugged (for a reason) and no issues.

Reason is it was causing a no-start condition with my EFI car. The factory relay/diode was failing and sending a small current back through the ignition circuit. The current was enough to confuse the EFI box but not turn it on. Result was no start. Troubleshooting was not easy.

The key on buzzer was cute... but I do not miss it and my car starts. On a factory setup, the same problem would likely cause a battery drain problem.