Sure, but user can always remove their message and don’t want others to know they wrote that. And yes, I know that if you put something on the internet, you should be aware that it may never disappear, but publicly displaying regular people’s names on different website with context is a big no-no in my opinion. Also in EU there’s a right to be forgotten, and while I am not sure about exact details (I am not a lawyer), this might be illegal here as well.