I'm not crazy about that song but when you listen to When He Cheats notice how the songwriters made sure to put in this:

"I might've saved a little trouble for the next girl,
'Cause the next time that he cheats...
Oh, you know it won't be on me!

No... not on me
"

If they'd left this out, she'd just be ranting and acting like a crazy woman so they added the positive spin. So she's tearing up his stuff BUT she's a strong woman concerned about other women. Image.