Claiming the harmlessness of second-hand vapor (when no long-term studies of the harmlessness of first-hand vapor have even yet to be done) is simply not a credible position to take in the context of imposing that second-hand vapor on others.
Hmmmm.
Claiming the harmlessness of theatrical smoke machines (when no long-term studies of the harmlessness of theatrical smoke machines have even yet to be done) is simply not a credible position to take in the context of imposing those theatrical smoke machines on others.
Claiming the harmlessness of tea kettle steam (when no long-term studies of the harmlessness of tea kettle steam have even yet to be done) is simply not a credible position to take in the context of imposing that tea kettle steam on others.
Claiming the harmlessness of Glade® Plugins (when no long-term studies of the harmlessness of Glade® Plugins have even yet to be done) is simply not a credible position to take in the context of imposing Glade® Plugins on others.
Claiming the harmlessness of Asthma Inhalers (when no long-term studies of the harmlessness of Asthma Inhalers have even yet to be done) is simply not a credible position to take in the context of imposing those Asthma Inhalers on others.
Claiming the harmlessness of medicinal medicine vapor delivery
devices (when no long-term studies of the harmlessness of medicinal medicine vapor delivery
devices have even yet to be done) is simply not a credible position to take in the context of imposing medicinal medicine vapor delivery
devices on others.
Claiming the harmlessness of a truckstop cook burning carcinogenic raw meats on a grill (when no long-term studies of the harmlessness of a truckstop cook burning carcinogenic raw meats on a grill have even yet to be done) is simply not a credible position to take in the context of imposing a truckstop cook burning carcinogenic meats on a grill on others.
http://www.atsdr.cdc.gov/csem/egpg/
*the finger*
I'm trying very hard to be succinct.