Hmmm, Gatopescado. Catfish. Yeah, you’re probably safe staying away from a house with 4 cats.
Why? Would you rather we didn’t scoop the cat boxes? 
ETA: And we actually have 5 cats. Two of the cat boxes are rather large. 
No problem; I get a feeling you’re somewhat passionate about this topic.
Alcohol consumption by pregnant women. Mark my words.
Driving a motorcycle without a helmet (still legal in many states, despite the societal cost of treating all those avoidable head injuries).
Tobacco use anywhere but at home.
Tobacco use around kids anywhere.
Salvia is interesting but it ain’t fun. Though, they schedule new hallucinogens pretty quickly after they are synthesized, so somehow I doubt they’ll get around to Salvia.
This one is not going anywhere. I seriously doubt it can hold a candle to the societal cost of treating obesity-related illnesses, but you won’t see overeating banned anytime soon. Or mandatory exercise.
And that you pay for with your own independent business, since major employers will forbid their employees to smoke at any time.
Don’t forget all those lovely healthy young-ish bodies with no functioning brain that motorcyclists without helmets produce. 
Semi-joking aside, Canada has had motorcycle helmet laws for quite a while now. It surprised the heck out of me to see all those motorcyclists driving without helmets when I made a road-trip through the US. The stats on fatalities without helmet use are shocking. I guess it is up to the individual to value their own life, but it still seems like a no-brainer (heh) to me that if you want to go fast on a motorcycle, you protect yourself and your delicate little melon as much as you can.
I hadn’t thought of that angle - how about employers not hiring smokers in the first place? You can smoke all you want, but no one will hire you, or you sign a document swearing you aren’t a smoker, and if caught smoking through blood tests for nicotine, are immediately fired.
I get the feeling that dextromethorphan-containing OTC meds be made more difficult to get in the US, similar to what happened with pseudoephedrine. I suppose the “currently legal/made illegal” part of my supposition would be unrestricted sales.
DMX sales are already restricted in some localities due to abuse, and now that pharmacies across the US have mechanisms in place to handle the sale of behind-the-counter OTC products thanks to pseudoephedrine, it would be trivial for the government to order Robitussin and its brethren behind the counter nationwide.
I feel the same way. I won’t ride around the block without a helmet, literally. My dad offered to let me take his Harley for a spin and I said no because he rode to my house without a helmet and I don’t own one.
Do I think it should be illegal to ride without a helmet, though? No. Because where do you draw the line? If we want to protect ourselves from ourselves, or from high health insurance rates, we should start with overeating and then probably alcohol. We all know how well outlawing those would go over.
Ahh, c’mon… you enact mandatory helmet laws, and then organ donations are gonna go in the cellar. Helmets transform nice young donor bodies into long & expensive rehab cases.
I had a TA in mech eng. who used to call bikes donor-cycles. He needed non-arthrytic cadaver knees for his research. He was always busy and cheerful in the spring, when riders were rusty from winter and there was still lots of gravel on the roads.
We should probably make them optional up here too.
Interesting question - how much should the government protect us from ourselves?
As in protecting a single person from himself? None. If the government wants to put out information regarding risks, go ahead, but that’s where the line stops.
And I hope the entire Bush administration is sent to prison for allowing it.
Yup, they come from the grocery store and get pressed immediately into a delightful new life as poo-bags. We scoop litter boxes into them and stuff a bunch into pockets for picking up after the dog on walks.