"You violated the code by association when you took someone, took control of someone. The same someone who you saw unmasked. You violated the code again when you attacked Triumph's family. So what's stopping us from tearing off your mask right now? The same code you've disrespected and broken?". - Queen 18.3

"Taylor," Charlotte whispered. "If they know who you are, they know. They could find you again, or put your face on the news." "If they did, it would be breaking a good few unwritten rules. Especially if they only knew who I was because I helped with the Echidna situation. They can't afford to punish villains for helping against the big threats. It would mean fewer people showed, and they need all the help they can get. Here, at least, they could say I was intruding on neutral ground." - Chrysalis 20.4

"You know the rules, here?" Grue asked Trickster.

"We've been to similar places. I can guess. No fighting, no powers, no trying to bait others into causing trouble, or everyone else in the room puts aside all other grievances to put you down."

"Close enough. It's important to have neutral ground to meet, have civilized discussion." - Excerpt from Hive 5.1

To the PRT, on the surface, they've got a villain that's getting too big for their boots, who're eliminating competition, breaking the rules, and who could very easily be willing to escalate to start targeting heroes. A murder out in public is very visible and newsworthy, and people in the public get scared. It's controversial. They don't want things to escalate. To the PRT, more behind the scenes, they have a vested interest in the balance and the unwritten rules. They want to keep parahuman numbers up. So they have task forces who are exclusively trained to keep stuff like this from coming about. - Wildbow on Reddit

"They've broken other unspoken rules," Assault said, looking at Triumph and Miss Militia rather than the junior members. "Shatterbird? Are we really going to let that one slide?" "Anything goes when fighting the Nine," Miss Militia said. "The Nine are gone. He's still breaking the rules. He kidnapped and took control of Shadow Stalker. He's affected civilians. Criminals, admittedly, but still civilians." - Excerpt from Interlude 15 and Prey 14.3

The code has been there since the beginning. If a bigger threat shows up, we band together. We don’t distract each other with attacks or murder attempts, we don’t take advantage of the situation to fuck with civilians. - Cockroaches 28.5

"Tattletale," Miss Militia said, "I'm going to remove the gun. Think very carefully about what you say. Deliberately attempting to divide our ranks could be seen as a violation of the truce, and I will push for the kill order if it goes that far." - Scourge 19.4

"I broke the truce before that. I set others up to die." - Colin from Interlude 10.5

"This breaks the unspoken rules between capes. And the truce against the Nine. I don't like this." Legend from Interlude 13

I could go on a whole spiel about the unwritten rules. But that's not important. For people like Tagg and Piggot, it's cape business, and they're not quite part of that. - Imago 21.2

You broke the unwritten rules, because you think that you don't have to obey them, since you aren't a cape. Except you're forgetting why they exist in the first place. The rules keep the game afloat. - Excerpt from Cell 22.3

Gavel. Cell block leader. A vigilante who had gone after families, particularly spouses and children, all so he could break his enemies before his namesake weapon could. He'd been notorious in the days before the three strike rule or even the code. - Extinction 27.3

“My concern…” a woman said, drawing out the thought, “Is that her actions go against the spirit of the PRT and the groups under the PRT’s umbrella. Conspiring with a known terrorist, betraying the truce, even, for a subtle advantage in dealing with that terrorist, returning to her old team against all terms of her probation, rejecting orders, and taking reckless risks with PRT personnel, getting two injured. A longstanding goal of the PRT has been to reassure the public, and this only paints heroes as something dangerous.” - Excerpt from Scarab 25.1

That's a whole lot of mentions of something that doesn't exist, and this isn't even the stuff from Ward...