[K0balt]

This is a well known exploit, and is proven effective in times of conflict. I think it is safe to assume that such efforts are ongoing in many corners of the world at any given time.

[kube-system]

So well known that it's just openly published:

https://www.cia.gov/static/5c875f3ec660e092cf893f60b4a288df/...

e.g.:

> In tempering steel or iron, apply too much heat, so that the resulting bars and ingots are of poor quality.

> Mix good parts with unusable scrap and rejected parts.

> Misfile essential documents.