Here's an example: Philip Cross had little interest in Max Blumenthal's Wikipedia entry prior to the Wikipedia topic ban (edited only 11 times from 2007 until Cross was banned from British politics in July 2018[4]). Since then, it's been edited by Cross 552 times[5]. According to WikiWho, Cross is responsible for 56% of all content on Max Blumenthal's Wikipedia page. Before the ban, Cross was responsible for 0.9% of the content.
[1] https://twitter.com/MaxBlumenthal/status/1381746315659509763
[2] https://news.ycombinator.com/item?id=17109290
[3] https://www.bbc.co.uk/programmes/w3csws6q
[4] https://xtools.wmflabs.org/articleinfo/en.wikipedia.org/Max%...
[5] https://xtools.wmflabs.org/articleinfo/en.wikipedia.org/Max%...
That said, if you go after a person for their personal social media comments and succeed, the common result is that people clam up about their personal opinions in social media. This is the common argument against the recent trend of digging through peoples social media in order to find something to hang them. All it does is to make people less open and more closed minded.
Looking at the archived discussion at the Administrator noticeboard (https://en.wikipedia.org/wiki/Wikipedia:Administrators%27_no...), the big issue seems to be the lack of any actually edit conflict. On Wikipedia, that is a problem if one want to sanction an editor for doing biased editing.
The whole discussion seems to be similar to the one about hardware back doors by NSA (if produced in a country where the US has influence), china or both. We can suspect there is a security problem, we can point towards incentives and capability to do it, but trying to do a proper response to the threat without anything concrete is difficult.
If you're interested, compare Max's page before and after Cross got involved with it. You'll see the same pattern we documented in our article. It just gets filled with more and more criticism.
This isn't the same for establishment-friendly voices. Have a look, for example, at the entries for Bellingcat or its founder Eliot Higgins (Bellingcat appears 5 times on Max's page). See how much criticism you find in those entries. Compare with the the articles below[1][2]. One reason of course is that Wikipedia deprecates sources it doesn't approve of, favouring instead "reliable sources" (mostly corporate, establishment-friendly news sites)[3].
Having followed the discussion and arbitration process in 2018, I don't really think anything will change. But I'd like to see more people become aware that what they read on Wikipedia, if it's political, is likely to be very biased and could be the work of nefarious actors.
[1] https://www.mintpressnews.com/bellingcat-intelligence-agenci...
[2] https://thegrayzone.com/2021/03/24/author-bellingcat-opcw-wh...
[3] https://twitter.com/fivefilters/status/1381290433658167299
One way we could measure bias in political articles would be to count how much of an article is sources by each news papers and then measure total media bias through establish finding in media bias research. A common cited sources is the study done during the 2016 US election which estimated media bias for each major news paper by looking at social media links where the profile were openly set as being in support to one specific political party. The more links that was shared by a single political aligned demographic, the more aligned the study would define the news paper.
Back to the specific at hands, it is difficult to build a case based on the sum of reliable sourced information without an actually edit dispute. One of the first layers in Wikipedia in order to address issues is through a third-party, and one would have to ask them to decide if the sum of sources are given correct weight in the article. Looking at Max page myself I can't say if the article is correctly reflecting reliable sources or not. I am surprised there even exist 121 distinct reliable sources about a political writer/political documentary maker. If anything the article looks very bloated and should be trimmed down to match subject matters of similar notability. I think there are noble price winners that has less coverage than this person.
I did not find any more Arbitration Requests after this date, and the topic ban has not been appealed.