Only if there are artificial souls much stronger (and more intelligent) than Kon. In the end, Kon is only powelful compared to ordinary people. Like anphorus said, they could also be a part of some group or cult that has developed powers much like Quincys. After all, if Quincys could do it, there's no reason why somebody else couldn't. As long as those others didn't piss off shinigamis, they would have been pretty safe.