I'm pretty sure the staff are staff for a reason. They're trusted! Meaning they won't go around banning others for pointless reasons, grudge or no grudge. The staff are there for a reason- To enforce the rules that were also put there for a reason- to keep the players safe, just like any other MMORPG or game for that matter. If they believe they were unfairly banned, maybe they should look back on the rules once more and contact one of the staff. The staff wouldn't ban someone unfairly, only if that player violated the rules some how.
People really need to read the rules a few times instead of just rampaging through the game. I've read some of these "unfair banning/ no-reason ban" journals on Deviant Art. One admitted that they were cursing in the local chat, yet they still think they were unfairly banned. Note they said there weren't near any staff members. But, they also need to understand that the average player could easily send reports to a staff member, which will be looked over.
They registered for the game, they should've read the rules. These people are overreacting. If they don't like Feral Heart's rules, they should go find another game that will deal with them.
I found the petition for the "Unjust Banning," but I will not post it here.