Or if it is good enough post it in the Gallery so people know it's yours.
it would be a good idea BECAUSE SOMEBODY STOLE MY JAIL RP but luckaly the idiot saved it when i was 66% done then finished it him self THEN stopped hosting the jail because he was a jail stealer!!!!! *TRUE story*
Pics or it didn't happen.
If you don't want people "stealing" your builds, put a password on your server or play in single player mode.
Then you'll have to deal with people saving your builds then. It's a core feature of the game. This whole topic is as dumb as those javascript crap things that try to stop you from saving images in your browser. People like to save builds so they can look at them locally and play with them later, or maybe add on to them on their own server. Just because a few 12 year old dorks like to claim credit for other people's work doesn't mean you should cripple the whole game. Just ignore those people.
It is not possible, nor desirable to prevent saving. Face it, what are you going to do with that save 6 months from now when you're tired of Blockand? Nothing. You might as well let other people save it so they can have some fun with it. And guess what, even if you could prevent people from saving (which you can't), it wouldn't stop them from being idiots. If you want credit and adoration, I would suggest posting your builds in the gallery.
And the list goes on.
disable saving is a good ideano person can save your builds and say it's theirs
nice idea people it would be great if it were like the loading rights add-on