The coding system is a throwback to when everyone was sure the LEO were on the forums trying to bust us all. Turns out of course, that if they were, and couldn't decipher the codes or the fact that it represented trading money for sex, then they were far, far too stupid to find their way to work, much less become a police officer. So, from day one, the coding thing was pretty pointless.
Some people still think the boards are stacked with UC cops setting up elaborate sting operations, when the reality is that people are just not arrested anymore for prostitution related offenses. The concern that LEO have now is human trafficking, and as many women involved there are selling sex as part of their enslavement, it might come under scrutiny. They also want to quash street walking.
I don't use the coding system. Never have, never will. It's pointless.