Right now, rumour is 60% saying retarded shit without facing RP consequences, and 40% being used properly. I think there could be a few ways to go about changing this.
1 - Its removal entirely, and adding a system similar to the city board for creating an actual marketplace for criminals, and then enabling OOC. (The OOC part is optional)
2 - Adding a cooldown, to incentivize using it for its intended purpose, and enforcing misuse
3- Creating a flag for it, and whenever someone misuses it, they lose access for x amount of time based on the severity of the punishment.
It'll also make the server seem more serious to newer players, not seeing a glorified ooc chat going off with stupid messages 24/7