The fact is fine, the comment is bad. Starting comments with 'LOL!' doesn't fit with the usual style of hacker news (why is he even laughing???). Stating "another" and then immediately stating why it isn't "another" (an arrest is no conviction) sounds really manipulative. And the fact (that HSBC was involved in money laundering) was already heavily implied by the parent comment, making it less interesting as the only value of the comment.
Heavily implied? I thought OP had merely chosen an unfortunate example which coincidentally turned out to be one of the biggest money-launderers and then was minded to state that the individual had not yet been convicted of that offense unlike HSBC. I'm not sure how it is manipulative - to what end? But I take it that I rather ruined the joke.