Kudos on extending the ban list to 300. On occasion, the Sim I'm a Land Manager for reaches the popular list. We get people from all over and quite a few griefers in which result in a ban.
The first problem names being listed twice on the ban list - I don't know how this was created but we had quite a few names listed twice on the ban list. That may just be a glitch.
The big thing I'd like to suggest is adding more information on banning. For one, I'd like to be able to double click on the name in the ban list to see who they are instead of searching for it. (Lazy of me, I know.)
Secondly, on the banning, it would be nice to know when we banned the person and for what reason from our Sim point of view. Right now, we have several sim admin's who have eject/ban priveledges and we all can't keep track of why someone else banned a certain indivual. It would be a nice feature for later removal off the ban list to free up extra space as we're approaching the 300 mark.
Also - a search option to find a name on the ban list instead of having to scroll down name by name to remove someone.