I believe we have all had that problem where we lay down a furnace, put in the iron and coal, and then someone comes up and takes it. I have, at least, some kid came up behind me, broke the furnace and ran away with my iron. So if it's possible, could there be something implemented, that when a furnace is put down no one can get into it, and when a player that is not the person tries to get into it they get this: This furnace is owned by player (name). I think I'd like CTF a lot better if this is implemented.
Edit: This idea is to prevent your TEAMMATES from taking your things. Not people from other teams.
Thanks! Metzy xx