[Tim Cullingworth]

I have to say that I report people who come back on to the track unsafely. It might be poor judgement, but unless it gets flagged there will be no learning. Remember that there are levels of penalty from reports from warning to ban, and it's unlikely that people will be banned for unsafe re-entry.
If it's that they were out of control having bounced of a wall fair enough so long as brakes are locked, and they are not just rolling across the track.