When things go sour, I just walk away. I think some people, especially if they instigate a break up in a bad way WANT the attention of YOUR poor behavior. It makes them feel JUSTIFIED in breaking up with you in the first place, "Crazy bitch, destroyed my clothes and my car. Good thing I dumped her! Who knows what she would have done if I had stayed with her."
The best revenge is living well. Walk away, cry in private (or with a friend you know won't reveal your pain) and go on to someone BETTER!
Talking about, whining about, complaining about, or DOING something to an ex only makes the Ex feel better about their bad behavior.
I have just walked away and lived with it. In the long run, I was ALWAYS glad I did. I NEVER woke up a year later and thought, "Damn, I wish I had destroyed all his records and broke the windows on his car. Why didn't I do that?" NEVER regretted acting like an adult after a breakup.
But, I'm willing to be nearly everyone who acts like a coked up, crazed celebrity after a break up eventually regrets it.
Where does it get you, anyway?