So back in the day when Capture the Flag was still around, I was one of the few people who actually played it regularly. What I did was get my guild together, and we'd challenge other guilds for sport to go against us. It was incredibly fun. Since it has been removed I have become extremely bored with Classic, and have left the server for other servers, thus ending my days of iClassic. But maybe, if CTF returned, my love for Classic would be resurrected.

I know you said you have more important things going on so you are unable to work on this. But a really simple way you could do this could be to make the building like Guild Spar, so that kills won't count.

What I suggest you do is put up a sign inside it with a leaderboard of most wins, and make it like guild spar, certain amount of rooms, viewing rooms etc. Maybe you could even make a contest here for levels and make new rooms for it, just some suggestions