It would make game balance worse.

It would make it easier for ap's, an already lethal class, to get kills. They don't even need those kills and charges to be lethal. They don't need a/b/s to be lethal either. They don't need a nicer pk range to be lethal.

I'm not saying ap's would get more kills than any other class, but a well played ap can seal someone's doom like no other class.

Yes, I would be very annoyed if someone in my range disarmed me and someone I couldn't touch sacced my weapon. So I take steps to avoid it. I use summon to keep them apart from the others. I keep them blind so they don't disarm me.

I also think unholy weapons should be stealable. There are huge advantages to be gained by having multiple unholy weapons, or not wielding your unholy until you have someone slept etc. The risk of theft is the price you pay for doing this.