npcomm

Hi all, I'm having a bit of an issue with one of my sites; I'm getting vastly overinflated numbers regarding clicks during seemingly random time periods. For example, on any given day I can expect 10 legitimate clicks. Recently every few days there will be a period of an hour or so where 1000+ clicks are logged, sometimes showing a CTR of over 100%. Is anyone else experiencing this issue or perhaps have an idea as to what may be causing these seemingly random flurries of illigitimate traffic?