They do not only accept Bitcoin They accept Money Pak, Ukash, Cashu and guess what it wont affect Bitcoin at all. I should imagine the people who have Bitcoins are pretty tech savy and woudlent even bother paying anyway, so the payments via Bitcoins will be very small compared to the other payment options they offer.
The silk road was taken down and now there is another one in its place.
http://www.secureworks.com/cyber-thr...er-ransomware/
If you actually read up about this cryptolocker crap, not that many people have even paid money to them considering the amount of computers its infected.