I'm suprised Super Mario Brothers was never controversial, it condoned racial sterotypes, mushroom consumption, animal cruelty towards turtles, and arson.
1) That is an ethnic stereotype, and it wasn't an issue until N64 when he gained the power to speak.
2)Mushrooms that cause growth are not illegal, just the ones that kill you or give you a crazy drug trip.
3)Koopa are not turtles, and its assumed that they are evil and intentionally cause harm to Mario whenever he walks into them whilst they wander. Self defense.
4)There are no instances of lingering fire damage in the mushroom kingdom environment. Bowser on the other hand keeps his castle filled to the brim with lava and fire snakes.