I guess I was lost in translation here a bit. If 100 cones means 1/8th or even up to 1/4th then I don't have much problem believing this - I've done this on and off over the past decade.
There are just so many factors involved that aren't accounted for, zero studies, MIXED SENSATIONALIZED media attention (most worrying, has faded now compared to what this "was" a yea or so back), and most disturbingly a whole host and variety of symptoms.
I'm not aware of any way we can separate what facts contribute to the symptoms directly - but it's not much of a stretch at all to imagine that smoking a couple of bad batches of weed (mold, containment, etc) and the fact that tobacco is being used (apparently? no data), along with no previous medical attention... it all just seems like a rather bold conclusion.
I'm not saying weed is harmless - quiet the opposite if you've read my past slightly misguided posts - obviously smoking ounces a day for months or years is not conducive to your health - mids/kb/headies, etc.... One thing that does stand out - most of these symptoms stop when all smoke (ALL SMOKING) is reported stopped for 6 months - most improve more quickly.
I don't like placing it under the name it currently has, and have a lot of issue with the conclusions being made about CHS
Anyway, to address the OP title, in this case, 100 cones does not seem unreasonable. Where I am from, a bong would be a joint (bout 1-2 grams) or a full bong pack (again, bout 1-2 grams)... so 100-200 grams, daily, sorry, no way... Waste anyway. 3.5 to 7.0 grams a day on average for a while I can see - if that's 100 cones, sure, doable.
I guess if we're talking about to the dome or not it becomes a bit more specific as you're kinda only consuming half of the product (I generally smoke in groups), but I can't make any broad claims about that.