Content scrapers, hacking tools, content spammers and an array of other \u201cspies\u201d make up nearly a third of all traffic at most websites, according to a new report. The report, from web security firm Incapsula, says that non-human traffic makes up 51 percent of the total traffic to a site. Some of that is benign \u2013 two-fifths of the non-human stuff is good bots like search engines. The rest is designed to damage your site or steal your information. The data was compiled from a sample of one thousand websites of Incapsula customers, with an average of 50,000 to 100,000 monthly visitors.\n\tThere\u2019s less spam and PC malware. The last quarter of 2011 saw spam levels at their lowest point in years, especially in the United Kingdom, Brazil, Argentina and South Korea, according to McAfee. Also, PC-based malware actually declined during the last three months of the year, and is significantly lower than in 2010. Unfortunately \u2026\n\tLast year saw increased malware for smart phones and tablets. Reports by both McAfee and Juniper Networks found last year was a record-setting year for mobile malware. No surprise that as Android has the biggest market share it is also the most popular target.\n\tAccording to the McAfee report:\n\tContributing to the rise in malware were rootkits, or stealth malware. Though rootkits are some of the most sophisticated classifications of malware, designed to evade detection and \u201clive\u201d on a system for a prolonged period, they showed a slight decline in Q4. Fake AV dropped considerably from Q3, while AutoRun and password-stealing Trojan malware show modest declines.\n\tCompanies can\u2019t keep up with malware threat. Ninety five percent of all enterprises are exposed to malware on a daily basis, according to security firm FireEye. The volume and sophistication of threats is outpacing businesses\u2019 ability to counteract these risks despite an estimated $20 billion spent annually on IT security.