USA Today gave an insight into how Israel chose which people to arrest and deport.
The newspaper wrote
'Israeli authorities, using information gathered on Facebook, Twitter and other websites, compiled a blacklist with more than 300 names and asked foreign airlines to block those on the list from boarding Tel Aviv-bound flights.'
In New York Times Yigal Palmor, the spokesman for Israel’s Foreign Ministry, said that the Israeli authorities had followed the activists’ plans and compiled the list of undesirables by tracking the Web sites and social networking of the organizations involved.
“We did not need the Mossad,” Mr. Palmor said, referring to Israel’s intelligence agency. “It was all out there in the open.”