No dear Das Reich, it cannot be shirk no matter what because bowing to tyranny is not accepting the tyrant god.
For anything to be shirk in quranic sense it involves belief plus intention not mere act. For example, if I call you as a fellow human being then it is fine but if call you as a god then that is not fine.
There are many people confused about shirk this is why I am disccussing it. So many call each and every act shrik because they think one can become a mushrik merely by an act.
For example, sajda is haraam in islam for anyone else other than allah. However if one does make sajda to anyone other than allah does that person become a musrikh? It depends on what he believes about the thing he made sajda to or what his intention is or what his purpose is.
If the person did not believe that thing a god then one has committed no shirk whatsoever. However one has committed a grave sin by doing what he was told not to do.
The point is, it is wrong to categorise people as kaafir or mushrik or muslim merly on basis of actions they perform.
Let me explain it further. A man eats and donkey also eats, will it be right to call a man a donkey or a a donkey a man merely because donkeys and people both eat? The answer is no we cannot do that because if we did that then the whole thing will become a big confusion.
Another point is that the quran was revealed to a people who already spoke the language that is in the quran ie you do not send message to a people in a language that does not exist.
What this means is that people who had this langauge that is in the quran had already the knowledge of the words in the quran and they knew their definitions also.
So we cannot read the verses in the quran and interpret them in the way that the words in the quran become senseless and confusing.
Since the quran argues against the people that were there already who had certain beliefs, so we have no choice but to accept those meanings of the quranic words.
So definitions of words like monotheism, polytheism were already in circulation at the time and so we cannot interpret quranic verses accoring to our individual likings.
Therefore shirk that is unforgiveable sin is all about believing in multiples gods with allah or other than allah.
regards and all the best.