As I've read in various places on this forum - this forum isn't as stringent as Bitcointalk - you can ask for your reputation to be restored if you vow not to commit any more offences.
In the instance of John Abraham, because the admin does not transfer feedback from Bitcointalk, it would be unfair if he began doing so for accounts with a bad reputation - it would most certainly drive individuals away without giving them the opportunity to atone for their misdeeds.
If you come across any account with a negative reputation, just take note of it and see if they repeat the same activity they did previously, such as John Abraham, who was accused of being owned by Naim (up to this day, no one knows if this is real, Because Bitcointalk members do not listen to explanations, they pass judgement based on what they believe rather than what actually happened), but if you come across any other accounts of his, you can bring them to the notice of the Admin so that he can determine whether they are the same individual.