Anonymous's greatest tool against the self-proclaimed Islamic State (ISIS) is to cut off its online recruiting operations, a former hacker with the group said Friday.
"The hacking, it adds some sensationalism," Gregg Housh told CNBC's "Closing Bell." "But in the end I think the most important thing is to stop the recruiting."
Housh is co-founder of Rebelnews.com. He said that tracking the terrorist group can be done through legal channels. Law enforcement also tracks Anonymous, he said.