We protect your email adress against any kind of misuse!
You only need to create an user account if you want to edit or follow changes a page: Special:Watchlist.
If you create an user account you need to specify an email. We only use you email to validate your account and to send watch alerts (if you suscribe to the watch function page by page). You may set your user preferences here: Special:Preferences.
We do not use your email for any other purpose! You will not receive any other mails from us and we will never share your email with other organizations.