Go to their profile page and you can then click on "My activity" and see what they have been commenting on and who else they have been following. On their profile page, you can see how many hubs they have published, read their bio and see how long they have been on hubpages.
If you aren't sure how to get to their profile page, just go under your own profile page. Click on " followers" and it will show your two followers. Just click on one of them and it takes you to their profile page.
If I misunderstood your question, I apologize! But you can learn everything about them from that profile page. If it is empty, no hubs written and they aren't leaving any comments....well, then you can be suspicious!