Dear doctor-writer man:
Maybe my posts have given you the false impression that I am so sick, so lonely, that I would appreciate receiving your ad via comment ON EVERY POST I HAVE EVER MADE ON THIS SITE. I wasn't using my inside voice. Sorry.
See, I can imagine you pimping your book once on my blog - whatever- but flooding it means that you aren't A) reading my posts and B) you are trying to annoy me.
I can find annoying things in my life all on my own. Thanks though.