No! Please no! BCCs break everyones filters/rules. Some percentage of derailed threads end with "Moving DL to BCC" which drives me NUTS because I get this message in my Inbox which throws me off my rhythm while I try to figure out what the heck it is talking about.

Personally, I think BCC should be eliminated. I think that every reasonable use case for BCC can be accomplished with a send and then a separate forward. Is there something I'm missing?