For a while I was forced to switch from BigWigs to DBM by an evil GM :) I've since left the guild and gone back to BW ofc, but now I actually miss a feature from DBM..
When you are fighting a boss and get a whisper, DBM would autoreply something like "I'm busy fighting %boss%, his health is at ??% and ?/? is alive. Whisper Status if you want to see this msg again.". Then after combat ended it would whisper that person again that combat has ended after ?mins and ?secs.
I know it's a sort of useless feature, but it was quite nice to have.
Well, these are kinda sucks. BossWhisperer spaming "You are now DND blah blah" every boss' one percent hp loss. After combat it began whispers "combat ended" messages to guys who hadn't whispered during the fight. CombatDnd just turn on DND flag every combat spaming massage in chat as well.
I prefer that kind of addon be not a DND flagger, but just whisper blocker/responder with massege tuning to turn off boss hp report, aftercombat massages and so on.