I have this on TGC and it works great! A small change to the query though, CoH could still be used within Emp's throne room, this corrects that (obviously, you'd use these inserts instead of the ones above):
Code:
INSERT INTO blocked_spells (spellid, type, zoneid, message, description) VALUES (1771, 1, 71, 'A voice whispers in your mind: "There are no heroes here..."', 'Prevent CoH in airplane');
INSERT INTO blocked_spells (spellid, type, zoneid, x, y, z, x_diff, y_diff, z_diff, message, description) VALUES (1771, 2, 162, 818, -325, 418.6, 208, 143, 15, 'A voice whispers in your mind: "There are no heroes here..." Try somewhere else.', 'Prevent CoH in ssratemple before Emperor\'s Room');
PEQ will add more entries as they are needed as well
