Hey, banning staff member here. In the situation that you were banned for, (Clip for context) you start to snitch on the guy that shot you. (Not encouraging that, but it is within the rules). After beginning the roleplay with the (now present) police, you lie and say that someone else shot you, a random person not involved at all. (While the guy that shot you is still around the crime scene). This prompts a new situation for the police, one that is entirely fictional (and ultimately ends in someone getting arrested that did nothing wrong). The powergame rule in question:
Powergaming is described as forcing a scenario or roleplay onto someone against their will, usually in violation of the rules. Using other game mechanics to powergame can include, attempting to force players to do things outside of the server, forcing players to commit suicide, forcing players to commit crimes, forcing players to RP or /me's against their will, forcing players to give their f3, etc etc,
(irrelevant to this scenario)
You may not invent evidence to force a roleplay nor may you take OOC matters into IC
The scenario you made up led to someone that did nothing wrong get forced into roleplay against his will, and very negatively impacted their time in the city. I do not think this ban was unfair or unjust, but good luck on your appeal.