Good Things Come in Twos
If you and your buddy want to quit the same job, you should do it together like this. Two heads are better than one, after all. Plus, if your boss tries to guilt you into staying, you can just say that you have to go with your friend no matter what.
Let the People Know
This person had every right to act according to their emotions. Who fires the guy who makes the signs say certain things anyways? All they do is write "roadwork ahead." That's a necessary job. This person should not have been fired.