I created this query to test the database.
Code:
SELECT *
FROM spawn2 s2
INNER JOIN
spawngroup s1 ON s2.spawngroupID=s1.id
INNER JOIN
spawnentry s3 ON s1.id=s3.spawngroupID
INNER JOIN
npc_types n1 ON s3.npcID=n1.id
WHERE zone='sirens' AND n1.npc_aggro=1
And it came back negative.....