Over 60 percent of internet traffic now generated by BOTS that can distribute malware, steal data and swipe passwords http://www.dailymail.co.uk/news/article-2531021/Over-60-percent-internet-traffic-generated-BOTS-distribute-malware-steal-data-swipe-passwords.html …
@grumpybozo good point. here's the link to the study : http://www.incapsula.com/the-incapsula-blog/item/225-what-google-doesnt-show-you-31-of-website-traffic-can-harm-your-business …