I learned that the firewall settings for 12.04 were by default disabled so I went to the software center and downloaded and enabled the GUFW firewall gui config. I thought having a firewall would be a good thing but it turns out that it isn't needed. I went back to the app and it was disabled automatically (for some reason). I removed it anyway.
I guess my question is, do you really need a firewall for desktops? Another question would be, did I do anything wrong by removing the app in the software center?