One could only hope these types of strong arm tactics against a diplomatic mission would lead to repercussions serious enough to make future incidents much less likely.

However, since it seems there is nothing more to be gained by continuing to hold the plane, what will actually happen is that high ranking politicians in the involved countries will apologise profusely, claim this was done by some low ranking bureaucrat that will be appropriately disciplined (sounding familiar?), and everything will go back to normal since no one wants to risk major economic repercussions over a minor incident.

I wonder if this could have a long term impact on how the South Americans view Europe ideologically though.