Re: "us vs. them"
Exactly, Lynn -- authors who buy their own books by the case to place in a handful of local stores on consignment, or to peddle them out of the trunks of their cars ... that's vanity press.
I'm not saying that you (or anyone) should give authors an infinite supply of free books. For me, with my various publishers, I get a contracted-for number of free books on publication. (And my agent gets a bunch of free copies too, to try to peddle to Hollywood and overseas, and to subrights vendors....) Any thereafter, I have to pay for, again per contract.
The way it works, I get the books from the publisher at cost, and with free shipping, but the price of the books comes out of my next royalty check. (Yes, I do promote my own books, but I don't spend every waking hour calling bookstores trying to arrange signings. And the books I get from my publishers are not for re-sale. I give 'em away like candy. (In fact, one Halloween I gave away copies of one of my YA horror novels to trick-or-treaters instead of candy.))
So, no, there's nothing wrong with authors buying extra copies of their own books -- until that becomes the publisher's business plan.
(A confession -- I once bought one of my own books. Retail! There I was, a couple of hundred miles from home and my cartons of books, when someone asked me for one. I nipped over to a bookstore, bought it, and handed it to the guy, without mentioning where I'd gotten it.)
For authors there's a difference between giving copies of your book to Mom and Dad and Uncle Bob, and selling copies of your book to Mom and Dad and Uncle Bob.