I wasn't aware of Ms. Hewitson, but it appears she can't devise a proper experimental design to save her life. As for Mr. (and most decidedly not Dr.) Wakefield, charlatan is the kindest word I can apply to him. His link between vaccination and autism has been disproved over and over and over and over and over and over and over and over again.
I could cite other articles showing Wakefield was right on the science. For example, multiple peer reviewed articles showing that vaccine strain measles is in fact found in the guts of autistics but not of normal kids. Also, all the articles you cited talk about whether MMR causes autism. What does that have to do with whether Wakefield was attacked for even saying negative things about vaccines? None of those articles show fraud, or misconduct or that Wakefield was even wrong on anything, (I don't believe, didn't always read further than abstract) all the...
For example, what would be inappropriately off topic to post to LessWrong discussion about?
I couldn't find an answer in the FAQ. (Perhaps it'd be worth adding one.) The closest I could find was this:
However "rationality" can be interpreted broadly enough that rational discussion of anything would count, and my experience reading LW is compatible with this interpretation being applied by posters. Indeed my experience seems to suggest that practically everything is on topic; political discussion of certain sorts is frowned upon, but not due to being off topic. People often post about things far removed from the topics of interest. And some of these topics are very broad: it seems that a lot of material about self-improvement is acceptable, for instance.