Bans should be given out with reservations

Otherwise, they will quickly get devalued and people start moving to other places where the price for a ban is higher. You should do something really great to get a ban (let alone a permaban). That's why members looking and striving for power should never be made moderators in the first place since they will heavily abuse their moderator's position (too many bans for too little effort) and severely damage the forum reputation as well (i.e. as a place where different opinions are welcomed)