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                     Designated PK zones should be added as well as more towers... The main PK areas shouldn't be in the main areas of the map. It's impossible to travel without being caught up in multiple mobs. 
                    
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 There is a designated PK zone. It is the War Room in the Battle Arena. Riots take place in main areas of the map because that's where players actually are. Riots build up over time, by killing people that pass by or happen to be afk in those areas.