Claudio and Don Pedro should have been more focused on the marriage that was already happening. While they were trying to make Benedick and Beatrice fall in love, they gave Don John a clear opening for one of his schemes. His play an important role in the story because without it, it would not have been interesting. Much Ado About Nothing is very funny because of Don John. It is a little ironic that someone would do something like this just for fun. Don John did not have a specific reason to ruin the wedding, he was just bored and wanted to see something crash and