Just because someone is whispering doesn't mean that they are gossiping or being mean, but it's not a good look. When people are whispering in front of other people it makes everyone else feel awkward and excludes others from the conversation. We can all remember an occasion when someone cupped their hand to their mouth and whispered something in their friend's ear. You can help but wonder what they are saying and if they are talking about you. If you can't say something in front of the whole group, save it for later, or don't say it at all.