I've checked it a couple of times. Mainly because I often use it like a little PM setup. That way I'm not hogging up someone's PM box and they don't have to manually click on it. It's just htere for them to see. Or for me to use when someone wants to leave a short comment.
This did remind me of something from another forum I'm part of. A guy on there was bored and curious to see how low his rep could go. So he had a post where he asked everyone to leave him bad reps. It was halarious. He had that thing to rock bottom. He still does it to and people leave him Bad Reps for Good Posts and Good Reps for bad posts.
Which every now and then when we had new members who didn't know better, and they'd leave him positive reps. So every so often he'd leave a thread titled "Quit leaving me Positive Reps" for a refresher. These reps also labeled who sent them wether you wanted them to know or not. Which usually meant that very few people actually got bad reps.