Not typically, maybe for a day or two, but if you are suspected of creating a second user name that too will be banned. They are pretty darned good at weeding them out.
I don't know the back story here, but Reefcentral is an immense forum, if you are having problems on the URS board or any other board for that matter simply hang out in a different area. If you plan on staying in the hobby it is an amazing resource, as you have apparently found out. Which is also why I say, if you are having issues or people are having issues with you just quit posting or hang out elsewhere, then you can still read and aren't trying to skirt rules with a second user name or having a wife/girlfriend/roomate sign up. Then the resource is still available to you to search read post or whatever you desire
As I said, I don't know what the back story is on this thread.