To be honest, if I was an investigator I'd be a bit scared to reveal myself. After I targetted a mafia player in ReZ's game, I was subsequently killed by the mafia and no one had any information on the killing, nor attempted to protect me.
Either the protectors are inactives like Dyson, or they're just covering close friend groups. At such an early stage in the game, revealing oneself to be an investigator seems to be tantamount to suicide.