After loosing my 3rd set about 60000 miles ago, I just left them off. My philosophy may not be right, but my 270 lbs has done a good job of holding the seat down for the past 60+k.
However it did make it a lot easier to get to fuse for my gerbings on the side of I-65 one cold rainy night last January. I was shaking so hard I don't think I could have got the stupid little nuts off, much less back on.