BuddyPress.org

In all honestly, I wouldn’t recommend disabling email verification. In fact – you actually should not only use that, but use it with Gravatar to double verify members. My BP communities are brand new, in dev stages right now. I’ve already been subjected to spammers which is why I support use of Gravatars – because not only will your users be verified in your community, but globally and this is a big step in spam prevention.

If you want to customize the registration page, many of them can be through your theme framework. However, too much code will slice your page & overall framework right down the middle and break your site.