Been testing that disavow files are not always the hero people think. Case: a client had a sudden 25% drop in organic traffic, mostly from backlinks with spammy anchor text. Cleaned up 150 low-quality links, uploaded disavow file, and waited. Traffic stayed flat for 3 weeks then dropped another 10%. Turns out, most of those links were from sites with high authority. I removed the disavow, built more legit links, and traffic recovered 20% in 4 weeks. Lesson: use disavow only if backlinks are truly toxic and have proven impact. Otherwise, focus on building real links and clean up poor quality ones manually. Data shows over-disavowing can hurt more than help, especially when your backlink profile is still decent.