Re: Last.fm Scrobbling
This information is actually very useful - to you. Last.fm use the list of music you listen to on a daily basis to make (very good) recommendations as to new music you might like. I have lost count of the wonderful new bands and CDs I have discovered through Last.fm recommendations.
If you don't want to hand over such information, that's fine. It is an option and the default is to leave it off. But, certainly in this instance, there actually IS a very good reason to turn it on. If you're the sort of person that actually enjoys new music, new directions and despairs of the generic shit forced down the public's throats by most commercial radio stations then it is an excellent system.