Complex sentence: Operation Payback is a coordinated, decentralized group of attacks on high profile opponents of Internet piracy by Internet activists using the "Anonymous" moniker-a group sometimes affiliated with the website 4chan.
Split into simpler sentences: Operation Payback is a coordinated, decentralized group of attacks on high profile. Organized Cyber Threat Counter-Exploitation, (2012) opponents of Internet piracy by Internet activists using the "Anonymous" moniker-a group sometimes affiliated with the website 4chan.