I have plenty of family members who share fake news, and I always do my best to educate them on why they should be more careful. In my life, it has always been best to be very nice about it, and also show them why what they shared is fake. For example, if they are sharing a fairly wide-spread fake news story, there is usually a fact check by a more reputable news source, which allows me to prove why exactly the information is wrong.
If you can’t prove why it’s wrong, in my experience, they are far less likely to trust you. Additionally, I think it’s helpful to be able to show why it’s harmful, especially if it’s news about another person that is inaccurate. For example, during pizza gate, the owner of a pizza place was given death threats because of rumors and fake news cycling across the internet. This is a real consequence of fake news that is hard to accept, and it can help people better understand the real consequences.
