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pk by default? So players can attack opposing factions on sight? with no need to be in enemy territory?

AFAIK that is how it works.
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And do you know when battleground will be implemented?

No.
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Have you had many updates allready?

1 when I first started--large download.

The question is not, Can they reason? nor, Can they talk? but, Can they suffer?
~Jeremy Bentham