Ah, but when there are more bottle blondes than real blondes, brunettes look more honest. It's similar to the curse of having an extraordinary bust: some men will assume it's fake and conclude that you were tacky and superficial enough to get a boob job.
Not all men evaluate women like prize-cattle in an auction. If you're tacky, I can probably figure that out from your speech, writing, or actions .. not your bust.
Getting a boob job is not only an action, it's expensive, physically invasive, and is usually done to achieve or fulfill an image of oneself that one believes can't be fulfilled in any other way than by having bigger boobs. I'd say it says a heck of a lot about someone.