Ban person for a short time.

Remove them via the members section in the admin panel. If you want to let them re-apply then make sure there are no outstanding warnings against them or they will be banned forever, and they'll have to create a new ID with a different email address.
   

Thankyou. 
Thats a great help

How do u remove outstanding warnings?
What if you declined their membership? as this counts as banning?
If I declined their their membership on a private or moderated registration account, how do I make it where they can retry it?
I made a test account then declined it,I tried reregistering.

you cannot remove an outstanding warning, those are only information for admins.  

Declining a membership kinda acts as banning, we'll be making improvements to the memberships page in the future to clear that up.

If you have a member that you've declined (which acts a banning) and you need to let them in, please email me at 'chief -at- lefora.com' with your username, your forum, and their username

I am founder. (Admin) I read on here that you had to remove warnings...so there was some falseinfo. then. FYI I asked this same question 3 times.....then finally found your response. Thanks Chief.