I absolutely would and have aggressively confronted would-be thieves before. This is a person who has shown a willingness to invade my personal space to deprive me of my property. Who knows what else they are capable, or what will make them stop treating me and my loved ones as prey? I grew up with this dynamic in a very bad area, and there was only rational response - don't be an attractive target.

The fact that they're not actually entering my home makes the decision to confront a lot easier, to be honest. A home invader understands the potential for violence and will come armed. A porch pirate probably thinks they will get away clean.