I would be very interested to know the legal situation this forum could find itself in if someone follows some dodgy advice and kills themselves and others, one rather loud and overbearing member of my local flying club was actually told by the CFI to keep his mouth shut and his learned opinions to himself after one bar room lecture too many to an inexperienced PPL.
I suspect that while civil action might be brought for any number of frivolous causes, no criminal liability can be held. This, like a hundred other flight forums, is one of opinion. The individual who takes counsel only at the hands of the internet is a poor student; few are going to find in their defense the assertion that "I learned it on the internet."
Curious that pprune is such a topic of discussion.