they lure odysseus' men into they're traps and never let them go, creating a time illusion and feeding off their souls.
what danger...
Odysseus is forced to put his men in danger in many situations, but specifically does so when they have to pass by Scylla, the sea monster.
The Lotus-Eaters pose a significant danger to Odysseus' men by offering them the intoxicating lotus fruit, which induces a state of forgetfulness and lethargy. Those who consume the lotus lose all desire to return home and abandon their responsibilities, effectively becoming trapped in a blissful stupor. This threatens Odysseus' mission to return to Ithaca, as his men risk forsaking their journey and succumbing to apathy. Thus, the Lotus-Eaters represent the peril of losing one's sense of purpose and desire for adventure.
She's a danger to Odysseus mainly because she is a distraction and he need to hurry and get home
Scylla and Charybdis are encountered.
The sailors ears were plugged so that they could not hear and Odysseus was lashed to the mast.
The sirens are a danger that Odysseus and his men must pass to return home.
no cause like you said, they weren't fully out of danger yet
The Sirens pose is they could trick Odysseus into going to their island and getting killed. The sirens could kill Odysseus's men and then Odysseus would end up going home with none of his men left.
Eurylochus tells Odysseus what has happened to the other 22 men. He did not eat the food as he suspected danger, so he was able to avoid the spell and run back to safety.
To win the war, win the battle, avoid danger, keep up morale.
Circe used poisoned food to turn them into pigs.