Based on my experience it seems to be easy. All you have to do is open some random adword account and start promoting competitor website. Google will suspend both accounts do to terms of service or what not. Google does not allow same website to be in 2 adword accounts... How do I know? They suspended my account 2 years ago and will still not renable based on terms of service (same website in two adwords accounts) they will not tell you in what account website is running.