This was in the news today, just emphasises the danger of data from the internet
This is a quote from the web page:
Scientists from the NYU School of Medicine analysed the 150 most-viewed YouTube videos on the disease and reported that 77% had factual errors or biased content in either the video or the comments section.
Their work, published in the journal European Urology, found that while 75% of the videos fully described the benefits of different treatments, only 53% warned of their side effects.
According to the team, 19% of the videos also recommended alternative and unproven medicines - some of which could directly harm patients.