For notes that have quest information or URLs for Glitch-related groups, etc., it would be nice to be able to take a copy to refer to rather than fire up Notepad or visit right away. I won't take notes other people have left behind.
Would also be nice to know how much longer a note will continue to exist in the game world, so, if it is useful info for other players, you can choose to make a copy for them and leave it behind.