Ah. So you're taking a character who's life was ruined because of people making fun of her and trying to spread around an insult as her fan nickname.A Chibi Hanako with the word bacon will not offend anyone, its just a shy girl with long hair that for some reasons is linked to bacon, if a katawa shoujo fan sees it he will know it is Hanako, and probably that bacon is her fan nickname.
So you're admitting to being cruel jerks now.Now if the viewer does not know about katawa shoujo he will probably just think its a silly graffiti about bacon or something, he will not deduce that bacon is her nickname given to her by some cruel jerks,
Okay, so, let me ask a few questions now.
First, what do you tell people if they ask you what that means? I can't see any way of saying "Bacon is just a nickname for a character tat was horribly burned in a fire," without coming across as a huge jerk.
Further, if it's so harmless, why of all the possibly things you could write there, would you WANT to openly identify her with an insulting nickname?