Not deadly to other humans? Maybe not, but the odor can be SO bad that it makes even humans sick to their stomachs. So I can imagine what it would do to havenworlders, and even other deathworlders who are not used to that kind of stink.

I've got friends where, if they crack them, I swear you want to move to another realm of existence it's so bad! It's worse than my puppy's toots!