I remember when a bully would have to go up to you themselves to mete out whatever harassment, and you could avoid a lot of it by just being aware and avoiding that particular person.

Juxtapose that with today, where any one bully can create dozens of accounts to bully in a swarm, and the bully has constant access to you from your own pocket. Also, a person in Minsk or Timbuktu or whatever couldn't just come up to your house in the middle of the night to harass you out of boredom.

This "we could do X before computers, why are we trying to ban X-with-computers now?" line of arguments is just intellectually lazy. If a bad behavior was well moderated in the past because it was labor or resource intensive, the sudden removal of those constraints is a material change that demands revisiting. Put another way, if a constraint stops working, we should change constraints, not just do the old constraint with a confused expression on our faces.

You can do all of this with SMS.

Kids know how to download or use free texting apps and sites, giving them access to potentially thousands of different numbers from which they can engage in harassment campaigns. In fact, it's an incredibly common tactic.

Similarly, someone from Minsk and Timbuktu can do the same thing, they have access to the same tools.