I would say they would be having fun with your uneducated posting
Schooling I think that is so funny and uneducated on your part, read and try to understand what you are posting OSHA is saying in what you have posted, is the same as what I have been saying about PVC
There are gases that are more Toxic that come from burning PVC and other Plastics than Hydrogen Chloride this should be the least gas for you to worry about, this gas you can smell, most of the other Toxic Gas given off Plastic when Burnt you can't smell and they all will kill you
You did say you where doing this for 4 months did you not, if there was a real problem with what you where doing you would of been dead after the first few minutes of coming in contact with any of the Toxic Gas coming from what you where cutting, the first symptoms of this Toxic Gas present is a splitting head ache followed by liquid in the lungs ( Pulmonary Edema ) if not taken care of right away we know what happens next