While this is technically correct from legal standpoint, the kernel of truth is in there. (Il)legality doesn't matter much compared to consequences. Consequences matter a lot, and in that case his advice is perfectly sound.
That one "joke" you made when you were sixteen might render you unemployable by 2040. People evolve, and their earlier marks on earth vanish. Before social media even the worst could re-make themselves into something better, now even the best have their worst moments permanently recorded.
The hope would be that, as more and more people are caught up in this sort of thing, we'd become more accepting of personal growth, as a society. This hasn't happened yet. Hopefully this is just a growing pain. But I can definitely see why people wouldn't want to take a chance, given the stakes!
That one "joke" you made when you were sixteen might render you unemployable by 2040. People evolve, and their earlier marks on earth vanish. Before social media even the worst could re-make themselves into something better, now even the best have their worst moments permanently recorded.