LAST EDITED ON 04-16-10 AT 01:21 PM (EST)
The idea had some logic to it, but ultimately it was bad for several reasons:
1) As Amanda pointed out, they really didn't know for sure that an all-female alliance was in charge. And even if there was, they didn't know for sure that they couldn't flip any of them at the merge -- someone would have to be #5 in the group.
2) At least make sure you're passing the idol to a known quantity, where you have some gauge of their trustworthiness --- not someone you've never seen play before. They don't know anything about Russell, but they do know that, hello?, he was put on the VILLAINS tribe.
A tribe glows in Brooklyn