Is your competitor putting Google Ads on their website? Are they making any decent money off of it? Click on their ads repeatedly until Google suspends their account.
This happened to me, but not from a business competitor. I put some Google Ads up on my WoW guild's forums hoping it would help offset the cost of hosting. One of our rival guilds on our server ran up the clicks to the point where my account was suspended for click fraud and I was no longer permitted to place Google Ads on ANY websites, even after an appeal.