There is nothing backing up what you are saying here, this is just conjecture.
"In mathematics, a conjecture is a conclusion or proposition based on incomplete information, but for which no proof has been found.[1][2] Conjectures such as the Riemann hypothesis (still a conjecture) or Fermat's Last Theorem (now proven, while has been called, Fermat's conjecture) have shaped much of mathematical history as new areas of mathematics are developed in order to solve them." (wikipedia)
How on earth do you apply the term "conjecture" to discussion about future possibilities?
As for the benevolent dictator's past proposals, definitely not conjecture. E.g.,
https://bitcointalksearch.org/topic/mike-hearn-foundations-law-policy-chair-is-pushing-blacklists-right-now-333824Let me explain it to you simply. Within Bitcoin XT today only the blocksize increase itself is fundamental to the protocol, and you can just run a BIP101 only version of XT or Core. These things that you are claiming here are completely counter factual and inaccurate. Therefore it is accurate to refer to your statements as conjecture because you have no proof backing up your statements.
1> Bitcoin becomes centralized (the protocol) via trusted nodes.
This has not been proposed for XT and has not been implemented in the code.
2> Bitcoin uses checkpoints to prevent another hostile takeover like its own.
The use of checkpoints has not been proposed for XT and has not been implemented in the code.
3> Bitcoin replaces anonymity with identity requirements (passports).
This has not been proposed for XT and has not been implemented in the code.
4> Bitcoin loses fungibility in favor of tainted coins, red lists, black lists, and white lists.
This has not been proposed for XT and has not been implemented in the code.
5> Due to #1-4, it would be hard to use any other implementation.
Because #1-4 are not true it will not make it hard to just run another implementation of Bitcoin.
I have studied political philosophy so I am well aware of how to predict and recognize tyranny, having 75% of the miners to agree with a fork in advance is not a tyranny by any stretch of the definition. Also to be the benevolent dictator of your implementation of Bitcoin is not wrong, and is not the same as being the benevolent dictator of Bitcoin. This is a very important distinction, I do hope that you can come to understand this difference. In the case of Bitcoin the code is all that really matters, so attacking the person has no relevance. What matters is what is in the code now, and none of the things you have mentioned are in the code now, it is completely counter factual. I am also aware of where you are getting this information from and you are quoting Mike Hearn out of context from a time before BIP101 was even implemented in XT and they where discussing hypothetical worst case scenarios. It does not even matter if Mike Hearn believes these things, since if he did try to implement these features like you claim he will, then people can simply just not use his implementation of Bitcoin and use another instead, it is that simple.