Remember this?

http://articles.latimes.com/2002/jun/12/nation/na-clinton12

"The GAO concluded that ''damage, theft, vandalism, and pranks did occur in the White House during the 2001 presidential transition.'' The report stated that some incidents, such as removing keyboard keys, placing glue on desk drawers and leaving obscene voicemail messages ''clearly were intentional,'' and intentional damage would constitute a criminal act under federal law. No prosecutions are planned, though."

Besides, this sort of thing will only be relevant a few times in the President's career and the odds are pretty good that if it were to happen it would happen in their "lame duck" phase. So what?

Pretty much every Presidency has some things started late that are known to carry over into the next administration; quite often (especially when there is a change of parties) this something the incoming President would have handled differently.

That's sort of inherent in the nature of having a crisp point-in-time transfer of power.

Abstractly speaking, and not suggesting any particular tie to the current situation (in this comment, at least): when the next guy is an agent of the foriegn aggressor, yes, it quite naturally would be.

"Barack Obama announces more sanctions against Russia, citing alleged Russian hacking during US election. However though the sanctions will annoy the Russians, they will not seriously affect them. Their true purpose is to create further embarrassment for Donald Trump by insinuating that he owes the Russians the Presidency."

Anyway, did you read the article? He's kicking out a bunch of ambassadors and closing down diplomatic outposts in a way that will be hard to undo.

Zero ambassadors have been expelled.