That's the way I feel about romances between criminals. In the movie, the way that Bonnie and Clyde met their end was the definition of overkill, but they were never heroes. I know that Harley and Ivy are supposed to be more like anti-heroes, but they were definitely villains. And I don't feel like most criminals should get redemption arcs. Most of them can't make up for all the harm they caused. There might be some that never endangered any lives--"The Case of the Honest Crook"--but if we start redeeming murderers and gangsters then it blurs the lines between the good guys and the bad guys.