Full disclosure: I have attended DBT groups before, and have not experienced the "aversive consequences" technique that I put on blast. Just from what I've read in books and heard from others it is one of the many things I hate about the modality and it's not one that will ever work for me, but I think it's great that it is an effective approach for many people here and elsewhere. I would never discourage anyone from participating if they think they will benefit from it.