if unroasted, yes. they are likely to contain harmful bacteria. also, if you throw them really, really hard at someone, it can be hurtful.
Wait, I'm confused. I was under the impression that PHF's are foods that need to be refrigerated for storage. Do un-roasted beans need to be refrigerated?
No. However, the warmer you keep them, or the higher humidity they are stored in, the higher the potential for infestation - just as with any raw agricultural commodity.