Maybe it's a cunning plan to avoid being contacted by certain people, but I've known plenty of people who would be put off by seeing "laziness" listed as one of your traits.
I'm not saying it's definitely something to avoid, maybe you only want to be hired to people who get the reference, or maybe you only want to be hired by people who, without getting the reference, don't instantly think "lazy = terrible!" (I fall into the latter camp).