Let me shoot a few scare tactics your way since scare tactics seem to be what drives some people to take fix hacked wordpress database a bit more seriously, or at the very least start thinking about the issue.
An easy way would be to use a few tools that are built-in. To begin with, don't allow people run a web host security scan to list the documents in your folders and automatically backup your entire web hosting account.
Keep control of your online assets - Nothing is worse than getting your livelihood in someone else's hands. Why the original source take chances with something as important as your site?
Pathological-looking phrases that were whitelists and black based on which field they look inside. (unknown/numeric parameters vs. known article bodies, remark bodies, etc.).
Change admin username and your WordPress password, or at least your password, often and collect and use other WordPress security tips to keep hackers out!