This is one of the ads in the subway in Philly.
Damon would destroy Bonnie. He would chew her up and spit her out, so much so that she would be less than we ever thought she could be. His man pain would be the main focus, just like it is when he is with Elena, or Stefan. And just as it has done to Elena and Stefan overtime, Bonnie's character would be worse for the wear even interacting with Damon for longer than 1 episode.