This is really a Photon question from a developer, but since it was sent to us, we wanted to make sure it was captured in the forums:
I'm signing into Photon using the CustomAuthenticationType.Custom process described in the "Getting started with Photon and Unity" tutorial, but I have a concern around the security of the player name in Photon. Basically, I'm using the Title Display Name from PlayFab as the PhotonNetwork.playerName, but I feel like this isn't protected in any way - that a hacked client could just say whatever it wants to for that value. Am I correct? Is there any way to prevent this?