That was my first reaction too, but on second thought it could be quite useful for spotting one's topics of interest on a page. I often do a cursory scan of th

That was my first reaction too, but on second thought it could be quite useful for spotting one's topics of interest on a page. I often do a cursory scan of the HN front page for discussions which might interest me, for example, and I bet I often miss stuff. It could make it less likely for me to miss comments of interest, too. If this is would be a plugin which could be turned on or off per site, I'd use it.