I'd agree that the Bouncy is REALLY strong with this one!
As DUmpDiver points out, Bill O'Reilly often made it quite clear on his show and in his writings how deeply he hated drug dealers, so if this brother exists and was a dealer, I thus seriously doubt he'd have been an O'Reilly fan.
Also, as D L R Pyro points out, most DUmmies tend to love and salute drug dealers, so this DUmmy speaking negatively of the brother for being a dealer doesn't seem right.
there really is a brother, probably named "Carville", and the mom is still alive:
https://www.fastpeoplesearch.com/kathleen-devaughn_id_G7774553066888334990
not sure if she's really Balti's mom or just Heather's sock
I'm not sure either.
Possible arguments in favor of it being the actual mom:
1. Correcting the DUmmy's spelling. No DUmmy would use a sockpuppet account to insult their own spelling.
2. Along the same lines, their writing styles appear to be different.
Possible arguments in favor of it being a sockpuppet:
1. The DUmmy could be trying to build their DU- street- cred by making it seem like their leftist convictions (Their "Commitment to the cause," if you will) are so strong that they're willing to stand up to their own mother about it.
2. Most older parents handle disagreements with their adult children in MUCH more private ways (i.e. In person, or through a phone call) to keep from drawing outside attention to the disagreement. For them to be arguing about it on a DU thread seems to be a cry for attention from fellow DUmmies.