It is naïve to think that you can absolutely prevent a well-funded hacker from attacking you. Every database with SSN or Credit Card numbers is a hacker target. And more and more hackers are being funded by foreign governments.
I recently attended the 9th annual Indianapolis IT Symposium where the local FBI office presented their annual State of Cybercrime update. Their briefing continues to be the most heavily attended breakout session of the entire conference.
As you move away from the “brochure site”, your level of sophistication increases, your exposure to potential customers increases, but so does your attractiveness to Cyber Criminals.