It's not out of choice but I have iTunes on my PC . A couple of weeks back I bought Rebel Get By by General Fiasco , and paid my 79p which is fine. However I looked at my list of purchased items and theres two tunes in there that I didnt know I'd bought. Because I'd left myself logged in on iTunes it had done the purchase when I copied the url of the song I wanted to listen.
So if you must have an iPod , and therefore iTunes, beware if you buy stuff off iTunes , log out when you're finished with it!