In a scenario which is like a plot from a sci-fi movie, security company Incapsula have published their 2014 traffic report for websites. Bot traffic (ie traffic to websites which is non-human) accounts for 56% on average, rising to over 80% for small sites of less than 1000 visitors a day.
Of these, 29% are consider ‘Bad’, ie they are attempting to hack or impersonate a good bot like Google or other search engine.
A sobering thought for anyone with a website, or a designer like me that a third of that traffic is trying to do me harm.