Unfortunately, the format of the '-censor' file is to put a 1 in for all points you want to keep, and a 0 for all points you want to exclude -- the opposite of Brian's earlier supposition.
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afni.nimh.nih.gov] (page 18)
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afni.nimh.nih.gov]
The -CENSORTR option was created partly to make it easier to censor out a few points, without having to create a whole file that specifies what to do for each time point.