Alice in InfoLand

My local public library has a policy that titles on the “new books” shelves cannot be renewed, in order to give everyone equal opportunity to read the latest books. But to enforce that rule when there are several other copies of the same book sitting there on the shelf? Obviously, no-one else is waiting for MY copy, so why not let me renew it? Sorry, said the clerk, that’s the rule.

I suggested that she check IN my copy, and then check it OUT to me (again), but that seemed too much like a renewal to suit her.
OK, I said, I’ll return this copy, and then immmediately check out a different copy of the same title … but I want to discuss this with the library director now, please.
Oh no, please don’t do that, said the clerk.
Don’t do what — check out a different copy, or talk to the director?
Either, she replied. The director doesn’t need to be bothered about this.
(Mind you, the director does know me, as both a fellow librarian and library user.)

Oh, really? I said, and dumped my copy into the book-drop.
Then I took a new copy of the same book off the shelf, and waited in line (!!!) to check it out.
When I got to the desk, the clerk asked someone else to cover for her so that SHE would not have to check out my book.
I took my (new) book and left. Should I bother to discuss this with the library director, or just avoid that particular clerk the next time I want to renew anything?