In some countries like the UK, even adults are discouraged and disallowed from carrying folding knives anywhere. Scenes like this are commonplace: https://twitter.com/MPSRegentsPark/status/974645778558980096
Are there laws in the UK that allow the police to enter your house and steal all your tools? For people who didn't click on the link: It is a picture with literally nothing but tools supposedly found during a "#weaponSweep"
This is fucking dystopian
What's your basis for saying that they're commonplace? One silly tweet doesn't really show anything.
The link points to one example.
The OP didn't support their assertion that constables commonly confiscate screwdrivers during weapons sweeps, but I don't think OP intended the picture prove that, just to show the definition of "weapon" in use.
This is a red herring in any case, since schools in the US would be perfectly entitled to remove scissors, guns, machetes, etc. etc. from their premises if they chose to, regardless of the 2A.
Moreover, to the extent that items such as scissors actually are banned in any significant number of UK schools (I doubt it), this is a new development that has nothing to do with gun control. There has been no significant change to gun control legislation since the mid 90s, whereas I can attest that scissors were certainly available in UK schools into the mid 2000s.