Sometimes you play a song that you don't like, and there it is for all your friends to see. Or worse, you leave your desktop and now have 20 - 30 songs that you don't like in your history. You should be able to remove songs from your history so it doesn't skew your stats, etc.
Also, I don't think a song should go into your history until afteryou've listened to it. If I skip a song 5 seconds into playing it, it shouldn't show up in my history. That's how Itunes works.
Please bear in mind that the Community is not an official Spotify support service. It's a place where we all help each other, whether we work for Spotify or not. So please use your discretion when using the forum.