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No, because if you can use a Rainbow Table, then the *very specific threat* that using a hash instead of a plaintext name is trying to solve gets shifted onto the person who uses a Rainbow table to collate a list of abusers.
The extra scrutiny that is applied by mainstream media to the first person to report if they come forward as an individual instead of as a group large enough to be irrefutable. The kind of harassment that happens when the New York Times publishes your name.
And what makes you think using a hash shields you from that? Script kiddie from 4chan reverses it and you're still the first person to report. That you obfuscated the report is irrelevant. It's still a provable report. Nobody cares about the script kiddie.
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