it's pretty richardish to limit saving at all though, whenever I see a neat save on a server I usually save it so I can play around with it in singleplayer and sometimes even play on it with my skype friends on a passworded server (not saying I made it of course, they don't seem to care otherwise and we have a blast anyways) and personally I think that makes this game even better
so honestly if you're so afraid of getting your save stolen put your name and blid in a few places, maybe have the mindset of whoever saved your thing thought it was cool enough to save, or make a topic of your thing so people will know it's yours
I know I can put my name around the build, but the possibility that the other guy searched for all credit and removes it remains.
put more hidden ones maybe, the more there is the less likely they'll go through the trouble