Currently, players have the ability to stay in jail for an indefinite amount of time. Players who do this are able to avoid being killed by those who are seeking revenge against them.
Therefore I believe players should be automatically released from jail after a specific amount of time, to avoid being able to camp inside the jail cells to avoid being killed.
Since players are currently not automatically released, this makes jail an exploitable area of the server. - Purposefully get arrested, once you're in jail you cannot be killed.
If you do not get paroled, accept a bribe, or release yourself from jail. You should automatically pay the minimum bail amount, where you're released. If you've gone afk/idle whilst in jail, that is your own fault and you should be expected to get robbed and/or killed once released.