No on Helmet laws, BUT if you are injured due to your lack of a helmet, your insurance company, provided it is in the contract, should be allowed to NOT cover your injuries.
Smoking in bars should be up to the owner. If the public doesn't like it, they can go elsewhere.
Smoking laws for children below the age of majority should be enforced. Kids do not have the ability to make those sort of decisions for themselves. It is the same reason we don't let kids enter into contracts, have sex, etc. However, drinking, smoking, sex, drugs and rock and roll should be available for all persons 18 and older.
Drinking, see above.
Selling organs. I have two kidneys so if both are healthy I should be allowed to sell one to the highest bidder.
You In Asia - No one has the right to tell me I must suffer a debilitating illness and suffer until I die of natural painful causes.
Speeding laws. I actually think speeding laws are for the most part for no other reason that to collect revenues. People should, and do drive for the most part a reasonable speed everywhere. If you get in an accident and it was found that you were driving to fast for the conditions you should have to pay for the damages. It would for the most part regulate itself.
Seatbelt laws. Do away with them. But as with helmet laws, if you are in an accident and it can be proven that a seatbelt would have saved you from injury, insurance should not have to pay any damages above what would have been avoidable if you WERE wearing a seatbelt.
Abortion does stop a life. In most instances it is NOTHING more than mechanistic life. 61.8% abortions are performed in the first 9 weeks, and the fetus does not know it is alive nor does it feel pain. Only 1.5% of all abortions are performed after the 20th week.
[1]