How to view all messages of a specific person on Steam?
Refers to all public messages and not private messages in the chat. That is, people may not even be friends, or may be, it doesn't matter. And public messages are all of his comments to the guides (the stranger and his), the mod workshop Steam (the stranger and his), the topics in discussions and forums, Steam, in other people's profiles, etc.
If at all possible, you need to do, what conditions and what tools?