The suggestion is to make the setting "Go Criminal By Shooting" set to Enabled as default for new players that join our server.
Why? I always see new players trying to shoot/attack cops including myself while they are in civilian mode. Even after informing them that they have to use /criminal to attack cops, some are not able to understand. Therefore, I think it'll be easier for new players if they are automatically set as criminal when they shoot.
I don't believe that there would be any negative impact because they are not gaining anything by remaining as a civilian. If they want to take a civilian job, there are plenty of prompts telling them how to go about doing so. Therefore, I think it's a very good subtle change that could just keep new players around for longer while they get to grips with our server and how it works.