Opt in in subscribe by email

Hi there,
Just installed subscribe by email as a replacement for suscribe2.
I discovered that there is NO double opt-in built in.
May I request this for a near future release?
As I see now it is possible to subscribe all my enemies and family members (fortunately 2 different categories) to blogs with this plugin.
Something many countries have developed laws against, as far as I know.
Or am I missing something?