Citation is Communication
One aspect of ethical information use is obvious--use your sources in context and cite as appropriate. From our friends at RVCC.
Inclusive and Diverse Sources
Another aspect of ethical information use is to be inclusive and diverse in your source gathering--and then be inclusive and diverse in the information you produce as a result of that process. This is not simply seeking out sources that show a counter-argument--though that's of value--but also seeking sources from small and large publications, from mainstream and independent venues, and from authors who represent a range of identities.