This is one bug i keep reporting that hasnt been fixed yet...
Bug only works in PVE combat
Way this bug works is:
have the instance option to choose what shard you want to go to checked:
When you hit warp to sector (to leave the instance you are in) it warps you out then pops up what shard you want to go to , If you hit cancel instead, it drops you back in the instance But you are invisible and can attack any NPC and they can not attack you back..
I repeated this multi times to make sure I could do it at will , and you can..
Tried it in multi instances (as klingon / fed rat) works with both factions..