As a non-techie, with an Android, I have a simple rule. I keep a "don't really care about it" e-mail address - in this case, gmail, - and use that for all the places that want a registration. Then, I register with abandon. BUT I never give any of them any form of other id, and NEVER give out my credit/debit card details. The post code and address that I use is close to here, but not actually here.
Google registration, and use of a gmail, does make life easier with Android.