Hahha, this is really cool.
I think they are right at their point because peeing of dog would have created a lot of mess and problems for them.
I would like to put this sign in front of my house but with a different writing.
Hey my sweet neighbour, please don't park your two wheeler here otherwise next time you might not find it's wheels :p
Let's hope that it would work!
Can't say anything for sure about it but I will definitely give it a try and will tell you about the result.s