Yeah now it is known but the first time I wandered in one of the zones trying to find a quest I was like I have pvp turned off so no big deal and boom I was flagged and of course there was a flagged higher level toon just waiting for the kill. Heck I also have been flagged multiple times while one a flight master and that isn't by choice and again when I landed there is a ganker just waiting for the kill. So one can be flagged unknowingly very easily.
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That I agree is a choice but sometimes the reward is very tempting but at least it is a choice to enter that area or not but while leveling it isn't a choice as those areas are not marked and quests can take you very near them or dig sites are in them force flagging a player.