I am not sure who you're replying to, and Red has taken a crack, but I will take one as well.

It goes back to game theory. The Evil Guys or whomever may want to lower the value of the coin by minting unprofitably. However, with free coins given away, their unprofitability will be profit in the hands of others. The deeper they want to go, the more significant the investment that needs to be wasted to achieve further instability. This will likely only be accomplished when the network is small. These evil guys will make money for everyone else, and everyone is fairly likely to know what is happening, and no one is really worse for wear other than those who wasted the time, effort, and money to cause the problem. As transaction activity grows, the ability for anyone to do something like this diminishes.

What destruction are you accomplishing when you force other people to profit off of your expense? Evil Guys' attack fails at game theory.