Facebook help Israel Blacklist Air Travelers
simply means that Facebook, the service helped Israel compile this blacklist, the same way the activists used it to coordinated their efforts. The context of how Facebook is used isn't clear from the headline, which actually makes it a good headline because people will read it. Hopefully they will understand once they do, that they were referring to the service, and not the company when they say Facebook.
"It doesn't much signify whom one marries for one is sure to find out next morning it was someone else." -- Rogers