no acct activation

is there such a way to deactivate the account activation after the registration?
so that after registration, the member could then just login immediately?

I think some forum does, and I want to do it to , but I can't find the answer.

it's because the only choices are activate by user or by admin

no at the moment forumotion doesnt do this.

I would also be wary of having a forum that allows that, in most cases forums like that have a battle with spammers posting links to all sorts.