Jonya Si said:
Obviously, playbys that are against site rules are off limits. We don't want people using actual IRL awful people as playbys.
Subjective takes like this is what leads to issues later on. The opinion on who is an awful person IRL or not cannot be quantified by rules, and leaving it to the discretion of people (who are in a position to do so) to decide whether or not someone is allowed to be essentially the pfp of someone else's sub-account is borderline power abuse.
Examples that come off my head include a character, who at one time was Chancellor for the Galactic Republic and Galactic Alliance (predominantly #1 major factions at their time), and whose profile picture was of Captain Jack Sparrow-- a character from the Pirates of the Caribbean film series played by Johnny Depp who some still believe to have been a domestic abuser despite being cleared of such allegations in court.
Another was someone who made a character with a profile picture of Donald Trump (after he had won the 2016 General Election) and went onto to write a politician in one of the aforementioned factions. Trump being a controversial person IRL who has both supporters or detractors as President of the USA.
There are obvious examples of people who shouldn't be allowed. Famous serial killers, fascists, communists, criminals etc. come to mind. Conversely there are people on this website who would place my aforementioned examples into these categories and arguments for why they shouldn't be allowed.
Just let people pick what they want, report what is clearly obviously not allowed, and if you don't like their choice (because of political opinions etc.) then don't interact with them.