It is just another communication tool to use. You could send them an email that you have no idea if it gets read or not. You might be surprised about Facebook users. Sportsman are probably more tech savvy than you are giving us credit for. There is NRA, Rocky Mountain ELK Foundation, SCI, DU and countless other hunter organization on Facebook. The majority of Facebook users are not going to go to WDFW's page so it mostly going to be hunters and fishers anyways.