The short answer is no.
But the long answer...?
- Sometimes I notice what you check out, sometimes I don't. The longer you take to be prepared, more I notice about your books. If you are embarrassed about what you are checking out, I would suggest having your card ready before you come to the counter (or use a self-checkout option if it is available to you). I have had people comment on their items, and then I actually have to look at them to understand why they are commenting, haha.
- I know my regular's hold slip codes. That doesn't mean I check what you have on hold, only that I know you have holds because I had to interfile other holds nearby.