> PyPi and similar package managers should start publishing security warnings about the hosts of projects. That in turn can eventually lead to bans of packages from generally insecure places. Maybe if we start seeing 'WARNING: projects from github.com may contain malware!' after doing pip install XXX MS will start listening.

PyPI goes out of its way to not be an arbiter of package quality or security. PyPI really doesn't want people assuming those things based on presence, since it's (1) an open index, and (2) the resources needed to make those kinds of determinations at PyPI's scale are several orders of magnitude greater than what PyPI actually has access to.

(This is different from PyPI removing malware based on user reports, which does happen. But that's a reactive task and not one that comes with any sort of blanket guarantee.)