Sumana

Yeah, I didn't quite get that. I confess that's a mode of conversation at cons I often find incredibly annoying, when I'm having a conversation with someone and random people just insert themselves. DMs accommodates a mode of conversation with strangers at cons I'm much more comfortable with- Hey, we started out discussing the panel we just saw, but we have other things to say to each other and we're blocking the doorway keeping new people from coming in, let's find a quiet corner or somewhere to sit down and continue talking.