To be clear about this, for future reference: is it doxxing to post the contact information for someone's public office, when speaking to people about their concerns is part of that person's job? (Indeed, even posting this information in anger, per se to encourage "attacking them"—but when the targeted person has encouraged such "attacks", created a separate channel for them, and thinks of receiving them as "just what they do" rather than something scary.)

For example, I don't think I've ever heard it called doxxing when someone puts up the address+phone number of a congressman and encourages people to write in. Nor when someone posts the "personal corporate" email of the CEO of a company to explain how to "go over the heads" of the CSRs of that company or to tell them about how you're boycotting the company.

I don't think doxxing is about contact information, per se; it's more about the line between someone's public and private personas. If someone actually has the equivalent of a public-persona "complaints hotline", then I would think it would be just fine to post that, no?