If you search Google on a regular basis, on occasion you may come across a spam site listed for a query and you don't know how to handle the situation. Well know you do. You can inform Google of a spam result by filing a report via this web page. Google works quite hard to make sure their search engine results are as good as possible although no person (or computer is perfect), that is why you can help fix the results displayed by Google via their spam result reporting  page. By the way, don't expect Google to get back to you by filing a report and in some cases Google may not consider the report.