I'm not sure, but largely there's not an incentive to do so. Is my site destroying the integrity of the data when I make it searchable by someone's name? Some people might say yes, but I would say that makes it more useful.
I could certainly go in and change what people said on my site. Then someone would quickly notice and no one would ever visit it again, and the official government data source would keep its integrity and remain the official source of data.
I don't see too may risks of this happening.