Ownership was never established in the first place.

Sure it was. I create an account, accept the terms and condition and put in your email address, your phone number and your street address. It's still my account, I am the one that accepted the conditions (you would cry foul if you were bound by the conditions you didn't accept).

If you want to be legalistic then the person who used the wrong email is in violation of CAN-SPAM[0], though my guess is courts don't have the time for petty matters like this.

[0]https://en.wikipedia.org/wiki/CAN-SPAM_Act_of_2003

Only if it was willful. We've kind lost the point of the OP but the example was accidental miss-typing and in my hypothetical above I meant accidentally

You have no legal business relationship with a service you've signed up for with no exchange of funds. An EULA is not a contract and they fully indemnify the service provider anyway. All you've done is initiate the creation of some database entries on someone else's property.