Are You A Book Moocher?

Hey fellow readers! Welcome to another rambling rant. Today I wanted to talk about a slightly different topic. The other day I was at the local Wal-Mart that sold books. I noticed a customer sitting down and reading  a book. At first it might seem fine that someone is doing that. I do that too sometimes.
But this lady was literally sitting there about a fourth way into the novel, and was still reading. I get that you might want to read a couple pages of the novel, if you aren't sure if you like the novel or not, but if you are already that invested into the novel, why can't you just BUY it?
Maybe it's just me, but I found it REALLY annoying that she just kept right on reading. And before I left, I saw her place the book back on the shelf! In my mind I was literally screaming at her thinking, "Just buy it already!" And if you don't have the cash, why can't you just wait for it at the library? Am I insane, thinking like this? First, it's rather annoying to other customers, when you block a section of the book isle, and second, I feel like it's also a kind of insult to the author. To me, it basically felt like she was basically stealing the experience of the book from the local store, without having to pay for it.
Maybe I've been too invested in books, but when I see people do that, it just really irks me. Hello, if you don't have cash to buy books, there's this thing, it's called the library. You register for a library card, and check out a book, just like everyone else.
So, I just wanted to get some prospective from some of you readers. Have you ever just sat at a local store in the book isle, and kept reading, and not buy a book, or do you mostly wait for the book at your local library? Do you think it's rude to read the book and not buy it? Feel free to leave comments about this subject, and let me know what you think.