Since 2017, Wikipedia editors have compiled a list of news sources from which articles are highly likely to employ systematic bias, lack professional editing and/or journalistic standards, regularly misrepresent sources, and/or fabricate information.
While its list is by no means a complete list of publications with the aforementioned problems, it has helped make Wikipedia articles more reliable by basing them off of sources covering the same events and information from a more objective and factual point of view.
To make Lemmy news communities better than their Reddit counterparts, I think avoiding links to those sources in favor of more reliable alternatives would be worthwhile.
Yeah, prohibiting extremely biased sources is probably a good idea, and that list sounds like it has a sound basis.