I don't want to hear about it anymore, other people are so bothersome.
Why don't you feel sympathy for others?
Because they suck, they always complaining.
Even if someone did something awful or embarrassing, it shouldn't be a reason for them not to discuss it. It is rude and inappropriate to govern what people can and cannot discuss. Everyone should be able to contribute to the conversation if they have the desire to do so.
I'm going to leave if anyone says anything bad to me again.
You shouldn't tell people not to talk, because silencing opinions can be harmful. Why not just listen to what they have to say even if you disagree with them?