Why do you feel justified in assuming what your company would think? And how do you justify working at such a place with the kind of corporate moral code that would punish employees for behavior not defined in the employment contract?

There are plenty of scenarios in which an employer believes that they deserve to know how their employee conducts themselves outside of work, including other jobs, and in those scenarios, this should be specified in the contract. In the news business, working for someone who might intersect with your beat, e.g. making phone calls for the local chapter of Democrats if you're covering politics, will often result in a severe reprimand if not firing. If you want to be a schoolteacher, you can be fired for having worked in porn, even if those days are over. [0]

[0] http://www.cbsnews.com/news/stacie-halas-fired-calif-teacher...