'0 downloads in the last month'
There is no 'report package' button. The support link goes to a 'we are hiring' contact form. Report bad packages as security issues? https://www.npmjs.com/security
Package signing. Review process. Scanning tools for dangerous packages. As a user, don't trust anything and isolate containers and jails. Ban bad actors. Charge for a curated package index.
Lots of other plugin stores do better than npm.