Just a little thing i thought about, when making a co op farm you should be able to decide if pvp is on or not if it is on, player's csn obviously hurt eachother, if its off yet again obviously you can't hurt eachother.
I know that's why i made it optinal there could be some people who want it but i do agree i, personaly wouldn't do it but it was in my mind and it was bothering me so i posted about to stop it