in factions, if you die in warzone or safezone you dont lose any faction power but in /warp end it says its a warzone but you lose power there if you die.
I think by that it just means that it isn't safe anymore. Where you can die. You can't die in safezones.
While in factions, do /warp info and read all the signs it will tell you all you need to know, don't forgot to read the questions round the back