ThreadMode is great, but any kind of dialog can easily get off the path of healthy discourse and onto the path of YabbitsAndAntiYabbits:
If you find yourself saying 'Yeah, but...' too often in a dialog, whether you use those simple words or not, give it a re-think. On the other hand, if someone's yabbiting you, it's a good time to OnlySayThingsThatCanBeHeard.