See this is what I think:
A good respected player makes a great building, while the crappy stupid one steals the better one because they do not have the skill themselves. Clearly with their idiocy, no one will ever bielive they built it other than their stuffty friends. While the respected, skillful player will not have to worry knowing everyone will bielive him.
^^This, in the end people will know you built it, not MaSt3RcH3iF117.
I get people who tell me all the time that some random person stole my build, they often leave my server rather quickly and confused since it doesn't bother me. I mean really, its just a bunch of virtual bricks and if you really want people to know you built something post in the gallery and if you do post in the gallery people will want the save anyways.
What I like is when someone on my server loads one of my builds then tells me that they built it, even better when they load ownership and can't build on it.