If I copy paste a malicious script here and you run it without knowing/checking what it do, do you think your instance admin should also put more rules and restrictions for the whole instance? AUR is no different than github or pastebin. It is on the user to vet what script they are running. Arch already has a more strict and vetted repo by the maintainer. Having AUR be a vetted place has no real good solution because of easy botting.