Yea, the data is cherry-picked. If I were to guess, we probably won't see statistically significant data clearly tied to legalization for a while.

Statistically significant for what question?

"Traffic fatalities are going to triple because of pot!" needs much less data than "traffic fatalities might increase slightly because of pot".

That's true. I think absurd claims are going to continue to be absurd. I don't think MOST people were expecting a drug-driven apocalypse.