Yes.
It might help but won't stop the spammers though.
Nasty wave of them in the last few days.
These are possible registration levels:
* Registration Disabled:
Disables the registration process, which means that no new members can register to join your forum.
* Immediate Registration
New members can login and post immediately after registering on your forum.
* Member Activation
When this option is enabled any members registering to the forum will have a activation link emailed to them which they must click before they can become full members
* Member Approval
This option will make it so all new members registering to your forum will need to be approved by the admin before they become members.For convenience, we have been on Member activation (requires an activation link in an email) with 2 step process:
1 form with captcha to limit computer application, 2 click link in activation email.
I have 26 people waiting on activation right now. Email was sent out but the link was not clicked. These are likely spammers that do not do that second step.
I have now moved it to MUST BE APPROVED the highest level. Will slow down legit signups and aggravate spammers.
I APOLOGIZE TO ANY PERSON WITH LEGITIMATE INTENTIONS FOR APPROVAL DELAY! It is a necessary evil because of nasty spammers!