BuddyPress.org

@elizawhat; Your post made me think, and I checked our (not yet) live site, which does require email confirmation. Mostly I’m thrashing around at home with a local xammp installation, and can’t remember what I did to make the live one require email conf. The plugin linked to below should do it, although it’s not activated in our site..! Something in WP or BP lets you require email confirmation, but I can’t remember what.

https://wordpress.org/extend/plugins/bp-xtra-signup/