[codedokode]

Would not disconnecting a cable from Russia or installing a firewall be a cheaper solution?

[Jerry2]

Their next move would be disconnecting the US.

http://www.hisutton.com/Yantar.html

What then?

[codedokode]

I remember reading the same about american submarines installing unknown devices on underwater cables.

[Jerry2]

Yeah, they both do it. US has been doing it for decades, however.

https://en.wikipedia.org/wiki/Operation_Ivy_Bells