On the topic of communicating more meaningfully, I feel like this is relevant. Although the situation was solved for this specific user (PewDiePie), the explanation for the ban seemed to only be found on this dev forum post stating that the name was blocked due to “pewdie” becoming a negative meme.
This type of information would be useful to have in the above image, rather than simply stating “your username is inappropriate for Roblox.” An improvement in moderation communication would prevent miscommunication such as what happened with PewDiePie’s fans spreading malice towards Roblox due to not understanding the nature of the ban.
Edit: Also, if the name was banned due to becoming a negative meme, then either prevent accounts from being able to use newly censored words in the first place. Don’t just terminate accounts because something has become censored AFTER account creation. Give those accounts a free rename along with an explanation or something.