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If there were no guns, the 250 pound bully could easily overpower a 90 pound granny. If they both have guns, Granny has a chance.
The solution to be offered is live monitoring of individuals. Probably through brain implants. If 'the system' detects a bullying event, it can be stopped in real time. Same with all manner of crime. Especially thought crime.
Even though the 'consensus view' will be that the benefits of such a solution outweigh the dangers, it still might be difficult to get certain greedy and self-centered conspiracy theorist people to show up at the clinic for their 'safe and effective' implant. Even when laws are in place to forced vaccinate for the public good, there still might be some people who will break the law and thus 'put the community at risk'. Fortunately, one of the most promising technologies seems to be 'neural lace'. With nano-technology, a lace could be seeded and grown without anyone needing to do anything.