What tools have we lost? Most restricted or banned items are usually banned because their primary use is as weapons not tools.
Totally agree. I'm seeing a lot of strawmen on this thread, where people are conjuring up fantasies of 'knife carry licences', etc. Yes, pretty much anything could in theory be used as a weapon, but as someone so rightly pointed out, schoolchildren dont go to school armed with nine irons, etc.
In reality, internet knife sales would be pretty much under the same rules as I have to follow in retail with kitchen knives and age restricted items, and which I have to have mandatory training in every six months. Knives are tools, but they are also weapons. Sadly, on the net, nobody can tell if people are buying a knife for reason a) or b). And they certainly cant check if that person is of legal age to purchase an item at all - on the internet, nobody knows your a dog.
Its not perfect for people who make knives, but there will be ways to cope with any new rules, and of course they can also advise on the best way to keep people safe, while not forcing people out of business. Storm in tiny teacup.