I've seen on several forums (and/or members thereof) around trades where they say they don't give advice to non-pros because they're afraid the amateur will do it wrong and they'll be found liable.
I've tried googling this question to see if it's ever happened but it seems most of the answers are around libel laws.
To expand on the question, has there been any cases where a professional has been sued/tried and been found liable/guilty for having given advice that wasn't correctly followed leading to an incident? If so, have any of those resulted in a finding of guilt or liability? What were the specifics of the case?
I'm primarily interested in the US but stories from other countries would also be interesting.
Example: https://hvac-talk.com/vbb/showthread.php?186644-gt-gt-READ-THIS-FIRST-lt-lt-NO-DIY-Why-NOT
While we (the membership of this site) are happy to chat with you about any topic there are just too many factors we must consider before giving advice. Safety and legality are the first things prevalent. The site Moderators are charged with removing DIY which shows reasonable care on our part to keep you safe so you or your next of kin don’t send your lawyer to knock on our door. Yes, we show reasonable care to disallow DIY so save your Lawyers time and effort.
emphasis mine