When asking a question, use a question mark(?).
Example: Cops are lazy because they aren't at red lights?
Because the way you wrote it with an (!) ending it you are stating that cops are lazy for not being at red lights. As is the the person you are replying too.
It is to their job to help the flow of traffic if it is being interfered with by non working lights or slow lights. This problem may cause accidents and it is the police dept duty to serve and protect the well being of civilians. The light also needs to be reported as not effective during certain times due to high volumes of traffic.
Cops are lazy b/c they aren't at a red light! It's not their job to be at red lights!