It wasn't a false hostage, other than the fact that one of us didn't put "hostage" in the advert. We (all) still adverted bank raid/assist. The kidnap was perfectly valid, although I adverted bank raid, I was not the one who started it.
Also Calamity was perfectly fine with it, which is why he slayed Elapin after him running into the vault and shooting the hostage, then screaming down our ears about "YOU DIDNT ADVERT HOSTAGE x20". We still negotiated, and continued with the roleplay.
Also this still doesn't negate what he did? He should have called staff if he wanted to complain.