Bloggers don’t just get fired for work related blogs, they also get expelled from countries.
Jan Pronk worked for the UN in late 2006 and was expelled by the government for supposedly undermining the efforts of the army in Darfur.
I’ve not read a great deal of Pronk’s blog (aside from the October 2006 post that lead to his expulsion) but I suspect he was blogging out of frustration with the pace of efforts toward peace and the self-serving nature of the efforts of the Sudanese Army.
BBC reports of his expulsion can be found here, here and here.