The calm people didn't even bother to question him, they knew all that he was saying, there is no truth in it.
As Ron cried out to them for help, the fact that he's know for false alarm made the whole thing more deadly and scary to approach. His mother in law want him to do that which is wrong.
The father in law is a soldier, trying everything he could to make sure Ron doesn't get away from this false alarm he's is creating at interval and also looking for someone to ghost for it.