B - Got some proof that secondhand vapor causes harm? Here is reference to a published indoor air quality study showing:
"Comparisons of pollutant concentrations were made between e-cigarette vapor and tobacco smoke samples. Pollutants included VOCs, carbonyls, PAHs, nicotine, TSNAs, and glycols. From these results, risk analyses were conducted based on dilution into a 40 m3 room and standard toxicological data. Non-cancer risk analysis revealed “No Significant Risk” of harm to human health for vapor samples from e-liquids (A-D). In contrast, for tobacco smoke most findings markedly exceeded risk limits indicating a condition of “Significant Risk” of harm to human health. With regard to cancer risk analysis, no vapor sample from e-liquids A-D exceeded the risk limit for either children or adults. The tobacco smoke sample approached the risk limits for adult exposure."
There's more and more very positive research all the time. Ecig users shouldn't have to prove that it is 100% safe. It is pretty clearly far safer than smoking and a great benefit to the health of people who are unable or unwilling to quit.
C - "that very well may result in an increase of smoking."
Pure speculation on your part. "