Every site on the web should be concerned about security. It would be tempting to think that only sites dealing with financial transactions, like ecommerce sites, need to pay attention to this point, but that is shortsighted. Once a hacker gets into your site, there is no telling what information they can gather or what damage they can do. The best bet is to invest some time and money into securing your site as thoroughly as possible, no matter what kind of site it happens to be.