Should you have the right to turn off your messaging — or your iPhone! — at the end of the workday?

During Talk Mobile we discussed the demands modern technology allowed on our lives — always on, always available, always accountable, always exhaustible. But is it sustainable? France is now wrestling with the issue, at least in narrow fashion. The Wall Street Journal:

The French pact between companies and workers, settled last week and awaiting government approval, amounts to a declaration of principle more than law. It gives certain technology-sector workers the right to stop using work tools such as email and smartphones after logging France's state-mandated maximum 13-hour day.

Germany also has some limited policies in place in limited areas. What do you think about the idea? Should your employer be limited by law or negotiated agreement to leave you alone when the workday is done?