The following is copied from Hans Adler's comments at Wikipedia:Arbitration/Requests/Case/Arbitration Enforcement sanction handling/Evidence.

Some AN/ANI sections concerning problematic behaviour:

• 2007-03 ANI#Talk:Essjay controversy & User:QuackGuru
• 2007-03 ANI#User:QuackGuru --- "His main userpage is a fork of Essjay controversy."
• 2007-03 CSN#QuackGuru and Wikipedia-related articles
• 2007-04 CSN#Proposed article ban for User:QuackGuru
• 2007-04 CSN#Proposed ban of User:QuackGuru
• 2007-04 ANI#QuackGuru, again --- "Wales is also a lefty." [1]
• 2007-05 CSN#proposal of community article ban --- "this smacks of attempting to win an edit war through the backdoor"
• 2007-06 ANI#Watch List on Project Space --- Report by QG, demonstrates his extreme stubbornness.
• 2007-06 ANI#QuackGuru --- "My sense is that QuackGuru cannot walk by a pile of smoldering cinders on Wikipedia without pouring on a can of gasoline. The above AN/I thread, in which QuackGuru accused User:Levine2112 of 'identity theft' (as far as I can tell), is a good example of this tendency."
• 2007-07 ANI#Canvassing accusation --- QG makes a baseless canvassing/meatpuppetry accusation.
• 2007-09 ANI#Block of QuackGuru --- "I have blocked this user for 24 hours for edit warring. This is the third time in the last few days that he has reverted three times - on Jimbo Wales, Larry Sanger and Essjay controversy respectively. He was warned on all 3 occasions"
• 2008-01 ANI#User:QuackGuru --- QG released from an undiscussed indef block.
• 2008-02 ANI#Stealth canvassing --- "Not only is there a strong suggestion that he engaged in email canvassing, but he also accused another editor of canvassing by using highly cherry-picked diffs and conveniently failing to note that the editor in question had notified people on both sides of the fence"
• 2008-03 ANI#Vandalism by Classic Tendentious Editor--- Classic boomerang report against Levine 2112.
• 2008-04 ANI#QuackGuru
• 2008-08 ANI#Levine2112 again --- Completely baseless report by QG.
• 2008-09 ANI#QuackGuru and Kelly going at it --- "He is revert-warring her sandbox, currently at 9RR (not a typo)."
• 2008-10 AN#QuackGuru topic ban --- The linked discussion is archived at Talk:Chiropractic/Archive 28#Topic ban.
• 2008-12 ANI#Harassment at my usertalk by User:QuackGuru --- "It was bad faith by DigitalC to accuse me of wiki-lawyering and harrsment. It was bad faith by Surturz to accuse me of bullying. An editor falsely accused me of readding comments to a talk page. We have a lot of WP:AGF violations today." -- "AGF does not mean OCTBIGFISOAETTC (Obstinately Continue To Believe In Good Faith In Spite Of All Evidence To The Contrary)."
• 2009-03 ANI#Disruptive editing by User:QuackGuru on Larry Sanger
• 2009-04 ANI#User:QuackGuru --- "The concern here is QuackGuru editing Jimbo's userpage to state that he was co-founder, not founder of Wikipedia." -- "Is this the longest running edit war in history?!? He's been doing this semi-regularly for YEARS now."
• 2009-05 ANI#IP puppet show (my oh my) --- "[...] Quackguru did not just put a sockpuppet on Levine's talkpage, but [...] he completely blanked out Levine2112's User page twice, and replaced it with a big Sockpuppet accusation, even though QuackGuru had filed no WP:SPI report."
• 2009-05 ANI#Admin needs to gain consensus first before considering to unblock --- "I do not think your posts here are helpful, nor is threatening Mangojuice with a block. [...] There is no need for admin intervention in a case where an admin just is doing his job."
• 2009-08 ANI#QuackGuru: continued harassment and edit warring/baiting --- "If I go to a talk page and see multiple archives with no search, I will add the template Template:search archives so that the editors on that talk page can easily search the archives. QuackGuru has reverted my addition of the search box on the Larry Sanger talk page, and posts that I am a sockpuppet"
• 2009-12 AE#Request concerning QuackGuru --- QG reporting himself.
• 2010-02 ANI#Uncivil behaviour after warning or is this how things go at Wikipedia-land --- Frivolous report against Rvcx for disagreeing with Larry Sanger.
• 2010-10 ANI/Problem on BLP noticeboard --- Ludwigs2 reports Ronz for blatant behaviour at BLP/N#Noticeboards, source criticism and claims of BLP issues, and QG for supporting him. Focus is on Ronz.
• 2010-12 ANI#User:QuackGuru --- Report by SlimVirgin: "[QG] appears to be a fairly disruptive editor. He has a strong POV on various issues, often seems not to understand policy, and is a serial reverter. He was blocked 11 times between 2007 and 2009 for edit warring, including one indefinite block. Nowadays he reverts up to 3RR, then stops to avoid a block."
• 2010-12 AN#Community ban for User:QuackGuru --- Subsequent ban proposal by Ludwigs2.
• 2011-03 AN#QuackGuru again - what do I do now? --- Report by Ludwigs2 that led to this case.