I don't see any problem here. If you use custom ROM you probably don't want to give information about yourself to Google anyway.

It would be even better if Google reviewed ROMs before certification. I have a noname chinese phone that sends data about the phone including a phone number to China (but Google is not much better - every time you enable geolocation it displays an annoying popup asking to agree to send GPS data to Google. Well, at least they ask for permission).