Anyhoo I can see this being used for lawful guard systems, not so much for unlawful ones.
for unlawfulls CDplattform + some wep platforms on the other side could work.
yes they will be still killed but by NPCs so no 4 hour rule.
if they dont know and dont start dodging after jump they will be instakilled and know whazzup there:D
(and move this damn battleship apophis in O100 to the damn minor hole xD)
at least i want to say.
dont just warn people. guard systems sould be better guarded -.- (like placing stationbattleships next to hole if faction has such class of ship - gunboat platforms are working for such stuff as well)