> essentially second hand smoke This is a weird argument to me, since second hand smoke causes cancer. I agree that we're probably more distracted than is good

> essentially second hand smoke This is a weird argument to me, since second hand smoke causes cancer. I agree that we're probably more distracted than is good for us, and there are contexts where that's a public health risk (specifically when driving), but until we see evidence that public phone use causes bystanders to get cancer, equating the two seems hyperbolic.