I mentioned in the Halloween blog post http://piratemc.com/2016/10/09/piratecraft-halloween-herobrine-resurrection/

That we would run a week with PVP off at /warp Halloween for those that want to explore it, fight the mobs and have fun without having to worry about PVPers camping it, do watch out for campers that wait for loot to be dropped, this is partly combated by the use of floating chests for loot now! (Good thinking Callie!)

So PVP is disabled in the Halloween event at present, there are also a few new mobs that were added, fun ones!