Is it illegal to post harmful and dangerous content on line?

Update: can you provide info/ a link explaining that it is
Update 2: Not so much harassment, I was think more along the lines of things like, 'drain cleaner can clear your sinuses or cure constipation', or 'eat nothing but butter and fat for 3 months', or 'The Matrix is real, you just need to believe and you can jump across buildings. That sort of thing
3 answers 3