Is Black/Cloud Ear Fungus toxic? Ought I shun it?
Cloud Ear Fungus is not poisonous, and is eaten by millions of people every day (mostly in China).  It is part of a whole family of "jelly fungus" which are almost all edible, and none of which are fatally toxic.
The article you linked cites two children who died of a bacterial infection due to black fungus which was soaked at room temperature for more than 2 days.  The article warns not to soak foods for too long.
You eat that black fungus dish every week?  Is this a medicinal regimen or something?