These are great answers, and the truth is, those keywords are actually more useful to hubpages.com than they are to us, unless the person specifically clicked on one of your articles in the first place. (as described below).
All of our analytics keywords combined, really tell hubpages.com which topics are bringing readers to their site.
The good thing about seeing these "unrelated to our hubs" keywords in our analytic reports, is that it also gives us an idea about what readers are looking for. I would say that if you see several key words repeated in your report, it would be a good idea to research them and get started writing Hub articles about them!