Is there a simple way to add a 'hide' button to items/rows of existing sites? The idea is that you don't want to see the same item over and over again. As a simple example, look at the top reddit posts of all time:
What I want to accomplish is to interactively hide items permanently, obviously this has to be stored somewhere. I was thinking about HTML5 client side storage, but storing the information on a server is also not a problem.
So is there a simple way to accomplish this? Maybe using tools like Greasemonkey user scripts, bookmarklets, browser extensions, Yahoo pipes, or some other existing solution to this problem?