ojchase

This answer does a great job of pointing out the minor frame challenge that it's very likely that no one will need to be called; some parties (e.g. from NORAD) might just start showing up. Large space objects really should be noticed before impact.

I too would like to see edits with better English. We might still disagree, but there's clearly thought behind this answer, and the core idea of waiting to answer until asked is at least sometimes relevant in related scenarios.