Yeah, sorry, I just think that there are other ways to paint someone as terrible and rape is just so freaking easy. But, maybe we can use it to the plots advantage: what if he took Botan at some point and threatened her--and Kurama by default--that if he does not come for her--ALONE--then he will soil her repeatedly until he tires of her and mounts her head on a pike. Botan's in danger against someone Yoko barely beat before and Yoko himself does not have time to waste, so he's probably going to end up walking into some sort of trap, but what choice might he have? We have a lot to cover before that point but Botan is going to be what always forces conflict that Kurama won't have comfort time to plan out. He also denied him the opportunity to contact Yusuke, Kuwabara, or Hiei, so he puts him at that disadvantage as well. Maybe Botan can eventually find her own way out of the bind and manage to save herself due to Goshi's carelessness? You know, a twist on the whole "needing to be saved" bit; she still needs to be saved but she got herself out and now Yoko only has to do half the work. 

That's an interesting take on it. Maybe the peon has some sort of item of power that connects him to his master, so the aura that he gives off to certain students begins to plague them and put them through such torment that suicide is the promise of release from his horrible influence? It would help explain why Anabe looked at peace in my post. He was free from it. He talked less, smiled less, and eventually he couldn't take it anymore. If this is a WEAKER version of Goshi's aura, the real thing must be pretty insane right now. Botan might even be driven to self-harm if she's exposed to it for too long.