The internet ones all created facilities that could have conceivably been used to build a "Silk Road". And by "conceivably", I mean "conceivably at the time", as in "Silk Road is not sufficiently non-obvious that it should be granted a patent".
The two pharmaceutical companies were involved in the development of drugs which were capable of being abused (one of which was heroin), and it's not like drug abuse was unknown at the time.
If not "before the fact", then at least accessories.
In the same way that gun manufacturers have been hauled into court for facilitating murders.