At first, I never cared either way about gold sellers. Someone still had to go to the effort of earning it. However, when I started to get constantly spammed with gold advertisements in whispers, mail, and macroed shouts, I grew to loathe the practice. I absolutely abhor aggressive advertising that forces itself on people. On principle alone I refuse to buy any product or service that uses such tactics. Telemarketers that disturb my peace, door-to-door flyers that litter my lawn, ads that engorge my mailbox, I hate all of it because it forces me to go out of my way, wastes my time, and is just plain annoying as all hell.
Gold whispers are annoying. Mail spam wastes my time to get to a mailbox. And macroed shouts clear off any conversations I might have been trying to have.
Gold spammers are one of the reasons why I eventually gave up retail WoW. I made sure the crying peon knew it, too. =oP