May cause problems viewing Hulu videos : No other problems . As Always Back up your original Hosts file
I personally ripped these from the software "Spystopper" Which make you pay and claims to block threats when all it does is modify your hosts file.

Download this txt and copy all addresses into your hosts file.

http://xfilesharing.com/id7ha01c9c4w/hosts.txt.html

If you dont know where your hosts file is visit this

http://en.wikipedia.org/wiki/Hosts_(file)