If that happens then the powers that be will consider the Bitcoin network a threat and try to stamp it out. First the bitcoin site would be blocked, then DMCA takedown notices and threats would go out to anybody that dares distribute a client or miner. ISP level filters may even be put in place to cull the plague.
Those media groups have money and they are used to attacking people unable to defend themselves. They will get a different reaction if they attack a multi-billion dollar distributed economy.
Ask yourself this: What will make the Bitcoin client eventually attain the title of "most looked-over", "most secure" and "most tested" piece of code/human machinery in the entire history of humanity?
Money.
Eventually Bitcoin will be running a hundred billion or trillion dollar empire. Please movie groups, attack us, and fall faster than you can ever imagine.
Ask yourself this: What benefit will there be to attacking the most distributed and secure piece of information ever created by our civilisation and running an economy that will soon dwarf most countries?
None.
You attack Bitcoin because of bad stuff in the blockchain, you die. Its actually that simple. There is no path in which they have success.