Given that Ansem Retort thrives on the Refuge in Audacity trope, it's hardly surprising that Zexion's impeachment trial was this. A bit of a subversion, though. That quote immediately followed a verdict of not guilty. This quote summed it up best:
Phoenix Wright: OBJECTION! Axel: GO FUCK YOURSELF! Judge: Objection overruled; go fuck yourself sustained.
The redux of Heartcore chapter 1 features this, with Royce Lashiec as protagonist Ame's judge, prosecution, and jury.
Terezi's trial of "Senator Lemonsnout" in Homestuck. For starters, there is no defense at all. Lemonsnout ends up hanged out her window. And it's supposed to be representative of her world's actual legal system. Also, the judge is called His Honorable Tyranny. Later on, there's the exploits of her ancestor Redglare, an actual legislacerator. It's disturbingly close to Terezi's roleplay. Senator Lemonsnout is just one of many Scalemates hanging outside.
The Team Fortress 2 comic "Unhappy Returns" has some of the mercs get caught and prosecuted for their crimes. The mayor of the town literally makes himself Judge, Jury, and Executioner, the only other staff member required for the trial is the public defender, and to cap it all off, the Mercs, who were guilty of several counts of accidental murder and property damage, were being charged for crimes they didn't commit! It wasn't until after the trial that the Mayor listed their crimes, which were things he committed.
Jones[whispering to Roy] Listen, here there are two types of accused: those who plead guilty, and those who piss the judge off with a time-consuming trial before being found guilty. Rodriguez: [also whispering] The conviction rate here is 114%, and that doesn't even make sense!
The Asperpedia trolls' trial in the Sonichu 10 finale features a judge who clearly considers the accused guilty and the defense presented by one of the accused (reading from a list of thoughts he had while high the night before). The trial ends in capital punishment for all defendants. A rare example as the kangaroo court is portrayed in a positive light by the author, attempting to make the end result seem just.
Charby the Vampirate: Sharister's gameshow. While it's unknown how guilt is proven the grand finale includes a gameshow spinner to choose the defendant's fate and most of the spinner's pie slots are for public executions like hanging, decapitation, being fed to a giant monster, being pressed to death, being burned at the stake, and being tossed into an iron maiden. The whole thing seems to run on a policy of All Crimes Are Equal as well.
Monster Soup: Five supernatural felons get quickly sentenced to rehabilitation in the same insane asylum on the same floor with the same psychiatric plan, despite the wide discrepancies in their crimes, ranging from petty theft to first-degree murder. The lawyer in charge of all five goes from professional to Bunny-Ears once he realizes that this is just a farce to get five specialists in a state-controlled experiment.