Ouch! Take it a little easier on the guy, Jeff. No reason to jump down his throat here. In fact, it sounded to me like he was going to do exactly as you suggested.
$5 sure isn't much, except that he may have to buy a heating pad ($10-$20), a water dish ($5-$10), bedding (okay, so newspaper is practically a negligible expense), a new thermometer, and whatever else might be necessary.
Maybe he doesn't get his pay check for a couple days and he's broke for right now. I don't think he's irresponsible at all in this case. I also don't think that keeping two bp's together can be considered negligent in any sense of the word. It may be "better" to keep them separate, but if it were truly hazardous to the animals, I think we'd see a little less shared housing at the pet shops.
Also, I don't know if I necessarily agree that keeping bp's together can be THAT bad for them. Might not be advisable, but I wouldn't give someone the impression that they might want to put off having dinner for a couple days so that they can separate the animals IMMEDIATELY.
Just a thought. I'm really not trying to start a flame war. I've seen some of your animals, Jeff, and I respect your experience and expertise. I just think you might have jumped on our friend here a bit too quickly.