Given that they're expanding to reddit, I was wondering how dbzer0 is setup to handle similar requests. The legal help page for dbzer0 is just an e-mail address.
Could always go to excessive measures, your own cloud hosted VPN node to hop to an external provider or similar. Unless you're a major target nobody wants to deal with multiple providers and jurisdictions.
But their business model is solely based on not disclosing your info. If they do, most of all for just some silly comments on an Internet forum, be sure they are going to fail.