I publish under anonymous too. Those little tests are hard to read!! I'm wondering if publishing under anonymous would have any impact on the decision of a potential sonsor.
It doesn't matter if you publish under anonymous. It asks EVERYONE to type in the little "capcha" deal. It just verifies that you're not a computerized hack post and keeps the blog from getting inundated with "junk posts". They know it's a real person with the typing of the code.