Command Blocks, Setblock And Cc = Grief

With the new possibility in Minecraft 1.7 to set blocks,
in combination with Commandblocks attached to computers there might be a high risk of griefing.
E.g. it's now easy to spawn a tnt block right above your head with a redstone block next to it (Or everywhere in the world).
Also with the summon command it's possible to spawn lots o' creepers :mellow:/>

So watch out what stuff you run on your computers.

You mean command blocks, as in the things that have no crafting recipe, don't appear in the Creative GUI, have to be enabled in the minecraft configuration file, then additionally have to be enabled in the ComputerCraft configuration file, all so that you can be "griefed". I don't think I'll be worrying about this any time soon (or ever). And if a server admin/mod actually did it to me, its simple, I'd just leave the server and find one with better staff.

Indeed. You would have to be the most idiotic, unskilled, and naive server admin ever to allow command blocks on a server where you don't want grief.

I don't think this warrants any more discussion. Server admins, if you don't secure your stuff, it's your own fault.