I agree BigRed. It's cool that you read and follow up on the safe use of products you use. You'll probably be in better shape than me when you reach my age lol. Unfortunately I think people become desensitized because warning labels and dangers are so prevalent in our daily lives. Heck, there isn't anything made that won't cause cancer in the State of California. Not everyone's lucky enough to have a state of the art shop. Countless DIYer's only have home garages or machinery sheds to work out of. I'm sure certified welders are schooled on the dangers of brake cleaner and wouldn't be surprised if most in the trade don't need to use it. In this case even good ventilation or open doors may not be enough. A few whiffs of smoke is all thats needed to cause deadly heath problems. We all seem to have the ability to gauge dangerous situations and avoid those with immeadiate deadly consiquence but unless something will drop us in our tracks those with cummulative effects such as smoking (I don't), getting methanol, gasoline or carb cleaner on our skin etc, possibly even cell phone use we tend to not be as careful.
I hope my post isn't was just another warning that gets ignored.....