If the person who backed it out had known who
committed the change, he
might not have been so hasty.
Unfortunately, that's not how Wikipedia works.
See, for example, this story about an author who was told he "was not a
credible source" regarding the basis of his own writings -- not because
there was any doubt about his identity, but because Wikipedia "require[s]
secondary sources."
http://www.newyorker.com/books/page-turner/an-open-letter-to-wikipedia
-Jason