The sabotage idea is the most likely to me, since anyone who would have written the articles probably would have tested the ideas first, and realized how stupid and unworkable they were. Instead it purports to be a real guide, so either it was written by a total moron, or someone who knew the recipes would end up backfiring. The time at which it was written is filled with examples of USG trying to subvert or break up anti-war groups, so it's not unreasonable to assume they might produce misinformation like this.