Using your real name doesn't win you any points. I could easily lie and say my real name was John Thomas. It sounds real enough. I could lie in real life with a fake name, too. Conversely, I have 18+ years of history using my pseudonym. It may not be a name chosen for me when I was born, but it has a very real reputation attached to it.
The lack of empathy you speak of is a consequence of hiding behind text over great distances, not of hiding behind fake names. People act more respectable when there's even the slimmest of chances the other person could physically harm them for their words; and/or when they can actually see the harm their words cause to another.
If you really have a pressing need to let your interviewer or employer know of your online achievements, speak to them in person about it with no audit trail.
The people who use anonymity to say horrible things are going to do so anyway. Go and search Google for "byuu 4chan". Now replace byuu with my real name. Why would I want my employer to be able to find those things?
