The idea of third hand smoke is plausable but the conclusion seems pretty one sided or dramatic if you will.
Fact: pollutants are in the air and cause a hazard.
Fact: Pollutants are in the water and cause a hazard.
Fact: Crispy Bacon can cause cancer.
No matter who you are you are going to come in contact with something that is harmful to you. Sitting around being paranoid about 2nd hand or 3rd hand smoke is silly.