It adds the substance of communicating to me that the poster's about as fed up as I am with treating the "dickfucks" with respect. On this and several other market-regulation topics.

That says more about the reader and their unwillingness or inability to absorb the content, than it says about the writer and their writing.

I’ve found profanity can add impact when I’m a regular reader of someone who normally doesn’t use profanity and I’m familiar with their normal lack of profanity.

I disagree, the information it communicates is visceral in nature rather than 'rational', but it provides a much broader cross-section of a person to relate to (or feel alienated from).