A woman annoyed with finding dog poop on her lawn has decided to fight fire with fire.

The homeowner, who only gave the name ‘Annie’ when signing off on her angry letter, threatened to find the dog’s owner and ‘take a dump on their doorstep and car windshield.’

The sign was placed on her lawn in Los Angeles and will definitely make people think twice before allowing their pets to take a number two there.

MORE: Husband saves wife from fatal heart condition when he accidentally shoots her in neck

The sign said: ‘To the person that lets their dog poop on our lawn and doesn’t clean it up: First of all it’s beyond rude. We live here and pay a lot of money to live here and its not a toilet.

‘Secondly, if you can’t pick up your dog’s poop, you shouldn’t have a dog. And lastly we are watching you.

‘The next time you let your dog poop on our lawn and don’t pick it up, I will personally follow you back to your home, wait until you get inside, pull down my pants and take a huge dump on your door step and on the windshield of your car. Love, Annie.’

MORE: Dog owner mauled to death by pet pitbull on Christmas Day