Note that your suggestions are all within the framework of the "accepted LW wisdom". The best you can hope for is to detect some internal inconsistencies in this framework. One's best chance of "deconversion" is usually to seriously consider the arguments from outside the framework of beliefs, possibly after realizing that the framework in question is not self-consistent or leads to personally unacceptable conclusions (like having to prefer torture to specks). Something like that "worked" for palladias, apparently. Also, I once described an alternative to the LW epistemology (my personal brand of instrumentalism), but it did not go over very well.
Brainwashing (which is one thing drethlin asked about the probability of) is not an LW concept, particularly; I'm not sure how reading up on it is remaining inside the "accepted LW wisdom."
If reading up on brainwashing teaches me that certain signs characterize it, and LW demonstrates those signs, I should increase my estimate that LW is brainwashing people, and consequently that I'm being brainwashed. And, yes, if I conclude that it's likely that I'm being brainwashed, there are various deconversion techniques I can use to negate that.
Of course...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.