[Andrea Piovanelli]

Safely going back on track is something everyone needs to learn to avoid damaging the car after a spin (and ruin the race of a fellow racer, mostly), I wouldn't like ghosts: safety on the track would otherwise become optional, in some ways.
And it's not like going on grass / sand is a race-ender (for most cars, at least). I would encourage you to report extremely unsafe rejoins, because they're technically illegal and dangerous maneuvres that could ruin the race for a lot of people in crowded races.