Bring it in.
1. It
may get worse. It
won't get better.
2. Some little kid in your back seat is going to run his hand along that piece of glass. His finger will heal, but your truck will forever be stained by his blood.
3. That little kid? Yeah, it'll be your neighbor's boy. Damn, that's gonna change the ol' neighborhood dynamic.
4. That new puppy your wife/girlfriend/whatever wants and you get for her birthday? It'll hang it's head outside the window sniffing the air. And you thought that kid's finger caused issues?
5. When the police are called to the scene (because of the bloody puppy's neck and how your wife/girlfriend/whatever freaked out and stopped traffic trying to deal with the injury), he'll come up to your door and rest his hand on that glass...and when he tases you, you'll at least forget about how hurting the puppy damaged your relationship with the wife/girlfriend.
I could go on...but you get it.