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Yep.
A little over a decade ago I did an interim gig for a mid-size manufacturer that did public RFP bids all the time. When some of those were taken to court - because your competitors will not shy away from any trolling to get your proposal out in public - I'd pull it out of the sales team's hands and redact it all myself. There were weekends where I had to do multiple 300-1000 page documents, but I didn't want someone else to mess it up: better it be my fuckup.
For each full page of black marker (using Acrobat's cool masking feature) all I did was write the rationale down in my own notes. I think we got a question from the judge once, and the rationale was sufficient to not have to redo it.
The system would grind to a halt if each redaction was challenged.
Ha! I remember defending federal criminal paper cases where the government would request extra time to produce "voluminous disclosures." I would get thirty five boxes of documents, almost completely filled with black magic marker. Rarely was anything meaningful ever disclosed