It's wrong to talk badly about someone's wedding.
Bob is attending a friend's wedding and is chatting about it with the other attendees.
Bob wants to comment on the wedding.
Bob highlights all the good parts of the wedding and does not say anything about the less positive parts.
Bob mentions how bad the food is and severely critiques several other aspects of the wedding.
Bob enjoys a decent chat with the other attendees and is thanked for his attendance at the wedding.
Bob annoys other people attending the wedding and is asked to leave the wedding.