Fake Account Customer Profile

Someone has created an account on my webstore and he is using a fake address and email (maybe his name too).

What can I do to prevent any visitor from entering fake email when creating a new account? What should I do about this fake profile? Should I just ban this account? Any advice?

Thanks.

why ban it,
just leave it,

its a pain but not going to hurt anything

thats just the way some folks are

I've had clients on the conference site leave an obviously bogus email.

Fine.

Lots of folks are uber-tired of spam these days... If everything else more or less checks out, works for me.

Some people may use your store to "test" the checkout process, or see what shipping may cost (if you don't have the shipping estimator active).

99.9% of such registrations are generally harmless. If you feel better about it, delete the account, but Merlin's probably right.

This visitor with the fake account always visits my site. He/She always puts items the cart but has not check out. I hope he/she will buy it in the end. Hopefully.