I agree with you. But I think we don't know the whole context of the thread. Let's give him a benefit of the doubt. The thread topic which we don't know is really important in this case.

My creative mind is thinking, what if the topic is like this... "What is the worst thing you imagine that you can't ever do?" And then he replied that way.

Also, I don't get it why didn't manage to see the whole thread? I guess it is sort of publicly available and can be accessed without even contacting the Facebook authorities.