I'm using WiFi Sync to sync my iPhone library with my Mac's library over iTunes. The problem here is that whenever I travel I delete songs which I don't seem to like. And whenever I come home my iTunes from the Mac syncs up and pushes these songs I dislike into the iPhone. Is there a way I can prevent this from happening? What I really need is that my iTunes should delete these songs from its library as well when I reach home knowing that I have deleted it from my iPhone but I guess thats even more complex. At least if its possible to prevent it from being pushed it back into my iPhone my problem would be solved!