A full 81 percent of young people think cyber bullying is easier to get away with than bullying in person, because you obviously never have to face your target. In the event the aggressor and victim do meet, it could go terribly wrong for the bully. You don't know what someone is capable of if you've only interacted through a screen and keyboard.
In the case of Charles Zelenoff, however, he should have know. Zelenoff, who fancies himself a boxer, chose an Olympian and heavyweight boxing champion as the target of attacks and just had an in-person encounter that shattered the power of digital hate speech.
Deontay Wilder is 6'7" and 227 pounds. He won a bronze medal in the 2008 Olympics. Since turing pro, he's been in 31 fights — all of which he won by knockout. Being an undefeated heavyweight who has never been taken the distance in any fight is an incredible feat in his sport. He is currently ranked as a top ten heavyweight boxer with every major boxing organization, and holds the World Boxing Council Continental Americas Heavyweight title. That is all to say: Wilder is really, really good at punching people in the face.
Zelenoff is the self-proclaimed "Best Boxer In The World The Greatest Of All Time." While he is not ranked with any major boxing organizations, it does appear that he has been training as a boxer for some time. His YouTube channel notes he has a record of 35-0 with 22 knockouts, though this couldn't be confirmed with any athletic associations, because it's almost certainly not true.