There are a lot of government reports that are commissioned on a variety of topics, and it's a very big leap from vague statements to actionable evidence. People love to imagine alien technologies whizzing around the skies, but the reality is more prosaic. As for plasma technologies, it's an interesting subject of study but in the very earliest phase.

The concluding paragraph of this article takes highly qualified statements and makes them appear definitive - as per the notion that the risk of collision is strong whereas the document itself states a very low potential risk. And this assessment is based on no evidence, but merely speculation.

All in all, not really anything of interest.