So if someone wants to set up shop on the street and sell moonshine or homebrew for cash, too bad for the liquor store that has to buy LEGAL booze and pay sales tax.
If one grocery store buys meat directly from a rancher, too bad for the stores that have to buy it LEGALLY from the slaughterhouses where it's FDA approved.
And I guess we should just let Merck sell whatever they can put on the drugstore shelf of their own free will.
Maybe we should allow thieves to take whatever than can get out banks of their own free will.
Or allow rapists to have at any woman they can grab of their own free will.
Who needs laws and borders? They just cause problems of socialism...
You're confusing some concepts. Yes, the FDA should be abolished and yes, Merek should be able to sell what it will directly to citizens and yes, moonshine should be legal.
http://www.fdareview.org/harm.shtml
However, thieves and rapists are initiating involuntary actions on their victims and not respecting property. It is the duty of any government to punish those responsible for these acts.
Since government exists to protect property and liberty, borders are appropriate. :)
There are many other secondary problems of socialism, socialism which is often justified because it is not attacked by conservatives, who attack the symptoms of the problem, not the cause.
FYI:
http://www.neoperspectives.com/secondaryproblemsofsocialism.htm