i vote no, there is already a battle area you can enter in sky world to pk,
i see skyworld myselfe has 1 big community gathering spot.
no need for pker to ruin it by interupting people while they try to relax and talk and think of what to do next.
Maybe a nice idea would be the option to choose to battle against each other.
by sending a pvp battle request for 1on1, and then you could battle on skyisland. and wont interupt anything else.