Update:
It seems the only way to get rid of the “ltc upgrade” network alert is to disable “notify-osd” which seems a bit drastic because I rather like the notifications in Ubuntu.
On the other hand, the only reason I run Unity is because I am too lazy to install gnome, perhaps that should be my project this weekend. :)
Could we search through the source code for the warning and just remove it and re-compile? Not sure what do you guys think?