How should I deal with an ex of someone I am interested in?

I am interested in a woman, we have gone out a few times, but she and her ex are always fighting, arguing. He is verbally abusive and just a plain ******. He tries to find out when we are going out together and when he does, her cell blows up with constant baggering. What do you all think the best repsonse to this should be?How should I deal with an ex of someone I am interested in?
You should never have to ';deal'; with anybody's ex. Why should you put yourself through that over some broad. And what is she still doing letting her ex run her life like that. I say, Kick her through the up-rights!