ERC20 contracts

Hi, I have a question about ERC20 token contracts in general:

Apparently after verifying on Etherscan, all token contracts become visible to the public.

  • Isn’t that a security risk ?
  • What if we do not verify our contract ?
  • Can some of these contracts (that are verified and visible) on the Etherscan be used again for new coins,
    or are they copyright protected ?

Thank you in advance!