slazer2au

Yes they could in several ways but not without causing massive upraw.

They could put financial pressure on Wikipedia by making payment processors stop working with them like they did with Wikileaks.
They could get ICANN to pull their domain. (I doubt ICANN will do it though)
They could tell ISPs to stop resolving Wikipedia’s domains on their name servers.

Absolutely nothing, never heard of him.

Also, directional vs omnidirectional antennas.

The majority of technologies that power the internet were developed in the 80s and refined in the 90s. Everything since then is built as a layer of abstraction on top of those core technologies.