Common sense is very uncommon, isnt it...:)

And not everyone may be as aware of the hazards of certain acts as you are ...drunk driving can be another example.....but welfare and well being of the people is the responsibilty of the govt... and if it feels that it needs to intervene in the larger interest of the people it does that by making laws and implementing them. At the end its in our interest.
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One life to live, live it to the fullest.