Discovery may well be "Just a game", and the Junker Congress PLAYERS might well be cool and decent folks and all that, and that is fine.
However, bringing guns into a courtroom inRP, threatening violence in a Courtroom inRP, and aggressive posturing in a courtroom inRP, will be responded to in kind, inRP. The Junker Congress might be a deeply connected pseudo-criminal organization, but a government courtroom is still a government courtroom, protected by Libertonian Law Enforcement, and it's pretty damn safe to say they'll respond in kind.
Nobody who gives a damn about 'authentic roleplay' should expect any less.
Unfavorable outcomes to ones actions are not the same thing as "Bad RP", and expecting to just get away with pulling something heinous and outright criminal in a courtroom is pretty misguided, if you take roleplaying and in character diplomacy even remotely seriously.
OH AND ADDITIONALLY: The Courtroom should not be expected to be the only avenue of communication between the Libertonian Government, her agents and representatives, and the Junker Congress.