Example A: If you're struggling with self-harm, one of the "aversive consequences" (I shouldn't have used negative reinforcements because they're two different things. Aversive consequences would be a more suitable term for this) would be that if you were to indulge your urges to use those behaviors your consequence is not being allowed to contact your therapist for x number of days.

Example B: Not completing homework assignments leads to negative feedback from group facilitators: acting cold and irreverent.

Example C: Storming out of a session = client is "grounded" from therapy and is not allowed to attend x number of sessions.

Those are harsher examples I have heard from a handful of people who have experienced these techniques. I'm sure the majority of DBT practitioners use positive and intermittent reinforcement much more frequently since a lot of people are reflecting on their experience in a positive light. But it is a tactic that is used as a treatment approach.

Maybe it's effective for some. It would infuriate me.

Here's one source for you and here is another. If those don't link directly to the relevant paragraphs let me know and I'll try to fix it

ETA: The first link is supposed to direct you to "contingency management" and if you scroll down you'll find it.