This is why ASICS are good for coins. It prevents botnets. The arguement about scrypt and ASIC resistant (not proof) coins like litecoin is that it allows botnet miners to exist. You can't botnet mine bitcoin, but as is easy to see- you can botnet mine the hell out of Litecoin or other scrypt coins.

It's one thing if a high hash power miner invests a good deal of money into buying asics or a GPU farm, then they make this amount of coin legitimately, but by using a botnet you destroy the economics of the coin. Its essentially printing free money by stealing others CPU and Electricity.