Couple of thoughts: First, shooting albino animals may not be legal in your state - it's not legal in Wisconsin (at least for deer). Second, as far as I know, Albinos can't reproduce -they're sterile. Third, I don't think I'd shoot it just because it is so neat to see...............on the other hand it would sure make a neat mount.
What it all boils down to is your own personal ethics. As, I believe Aldo Leopold said, "Personal ethics are what we do when know one else is watching". Which ever way you decide is fine by me as long as it's fine with you.