Personally I think you should take anything people say on the internet way to seriously. Mainly because it's the internet. You can post and say just about anything , even if it a false statement. I beleive that people take what other people say on the web way to seriously. For an examply people get fired from jobs about what the say on facebook, about their bosses. I mean come on people who would belive the information that one person says.
Now I know theirs always that one person that beleves what that persons about someones true, but people need to understand that most things on the web aren't true. Not to mention the comments of facebook are normally directed trowards one person. People aslo tend to blow what people say on facebook out of portion.
Now if the comments about that person conuted? That easy one block that person. There so many was to stop a person from say such terrible things.