The ethical standards for journalists cover behavior outside of the workplace proper:

Society of Professional Journalists Code of Ethics

Item 3, of 4: Act Independently

Journalists should be free of obligation to any interest other than the public's right to know.

Journalists should:

    —Avoid conflicts of interest, real or perceived.
    — Remain free of associations and activities that may compromise integrity or damage credibility.
    — Refuse gifts, favors, fees, free travel and special treatment, and shun secondary employment, political involvement, public office and service in community organizations if they compromise journalistic integrity.

~ Becky in Tucson