So you admit you falsified your ElReg registration info? Are you certain you want to do that? After all, it's been your handle "for like 20 years" (yeah, sure, right). I'd hate to see you lose it.
You also admit that you use email addresses that are not yours? There's a word for that.
How on earth do you equate using a proper email address to register here with "giving your email addres(es) to world+dog"? Do you really think ElReg is likely to sell your address to spammers? Or are you so paranoid that not even your DearOldMum knows your email address? Because I guarantee that ElReg is a hell of a lot less likely to be compromised than she is. Kinda makes email pretty useless for you, no? So you may as well use the real thing, useless as it is ...
Your privacy in this context is totally meaningless outside your personal paranoia.