I was a little confused about the fans' plan to flush out the idol. They split the vote, but the only "Cool Kids" alliance member they didn't vote for was the guy that actually had the idol. Why not target him and force him to use his idol?
They weren't trying to flush out the idol. They wanted to get rid of Hope and used Eddie as the back-up vote in case one of them got to use the idol. They were trying to keep the tribe strong for challenges while still bringing the "cool group" down to two members. Hope was their first choice because she was the weakest of the three in challenges.
They seemed to think the guy with the idol was the best at challenges, so he was never a target.