I'm going to lay a bunch of caltrops on the road because I'm fed up with these speeders.
I hope you're joking. Why would you want to damage someone else's car?
It's only going to damage the tires, and they deserve it for speeding.
If you are so concerned about the speeding cars, then you should contact the police or the local government. Taking the law into your own hands by placing caltrops down will just likely end up with you facing criminal charges. It also can injure and kill people when the cars tires burst.
I don't have the time to report it! I'm tired of this.
If you have the time to go out and put down caltrops, then you have time to contact the proper authorities about the issue. Your caltrop plan will just result in damaging vehicles and potentially injuring people. Contacting your local government or the police could see real change occur.