HN user
By linking your Disqus comments to your e-mail. For example your comments on sexual preference blogs, political blogs etc. Mapping your life, possibly opening up for blackmail.
You don't want to try 150 million Adobe logins on Disqus. You want to identify which ones to test first.
Researchgruppen seems to be in violation of the Disqus terms of service by harvesting personal information and also disclosing this in other mediums.
True. A percentage of the union of Adobe and Disqus users will use the same password for both services.
Get 150 million e-mail addresses from Adobe hack. Match vs Disqus users. Profit.