So how would I know that it's impractical for you to check them out? I was just curious about why you wanted to rip them off at the library and you answered me, though maybe in a little more detail than necessary.
I've always had a library within 5 miles of me. Apparently not everyone does.
I don't know about your chances of getting busted, but it seems obvious, not knowing how the library you plan on visiting is set up, that the more DVDs you would rip, the higher the chances of getting caught.

Good luck