If everyone is vaccinated, there are the side effects of vaccinations (if any - I was not endorsing Confusion's 1-in-10000 number). If nobody is vaccinated, there are the consequences of measles, which are far worse.
But Confusion's argument doesn't (currently) work with Confusion's numbers. (Let me be clear: Confusion's larger point is correct, that not vaccinating is much worse than vaccinating.) 800 cases of measles (and climbing) is not worse than the consequences of vaccinating at Confusion's number for the major-side-effect rate. So for an individual making the decision today, with Confusion's stated major side-effect rate, the risk is higher on the vaccination side - at the moment. The way the outbreak is spreading, that may not be true for long, which I tried to emphasize in my original post.
But it wasn't intended to be a major position statement - it was intended to be a minor, technical quibble with Confusion's point. (And confusion seems to have been the result...)