Just a pure observational question here. Are more or fewer people using cell phones than in the 1980's?
If cell phone usage per capita has gone way up, shouldn't the incident rate per capita go up too?
With smoking it is very easy to track the percentage of the country that smokes and then later the lung cancer rate, this data doesn't remotely match that trend in any traceable way.
I cannot prove one way or the other what happened to your step-father and it is still a tragedy, but this data would make it difficult to show a link.
I'm just fine with ads, but if blocking ads is theft, so is all the junk ad companies put on my computer. My disk space isn't free. No cookies, those only come through if I white list them, no flash cookies. No hidden junk. If your ad breaks anything if these conditions are met, I block the ad. Fair is fair.