I'm a graphic designer, it is REQUIRED that I sit on the internet 8+ hours a day gathering pdf's, emails, stock photography, free vector files, keeping up with social trends, web design, email design and taking short breaks browsing to 'switch' my mind to the next job. When I get home--by habit gained at the workplace--I check the news... cnn.com, salon.com, washington post and also prone to check facebook.
So it is my job requiring me to be online which will eventually make me depressed. Seems that could be a legit argument against your workplace insurance in covering medical bills and could have even further repercussion?