Would like to see the ability to hide the questions that are visible to _me_ if a question is asked by a user with a reputation lower than a threshold set in personal preferences.

EDIT

I meant as a personal preference, to be able to hide which questions _I see_.  This is similar to how Slashdot does it: you can hide comments that are below a certain threshold, but this in no way impacts what _others_ see.  Obviously by default this would be disabled.