Ashkan Soltani, an independent privacy-and-security consultant, pointed out that the move is not unprecedented for a tech giant.
Senator Richard Shelby's threat to block all of Obama's nominees is unprecedented obstructionism.
Blair, the most successful leader in Labour Party history, offered an unprecedented public rebuke to one of his successors.
Mass shootings are also not unprecedented, having happened at Ecole Polytechnique in 1989 and at Dawson College in 2006.
Although the level of violence is unprecedented, hypocrisy and governing with an iron fist are nothing new for President Assad.
Against this unprecedented breach of privilege parliament sent a deputation humbly to remonstrate; but all to no purpose.
He would raise horses, he declared, on an unprecedented scale.
He would set impositions of unprecedented length, and revile himself for ruining the victim's handwriting.
For my unprecedented action I claim that no other course lay open to me.
Let the celebration be of unprecedented splendour, so that the Master may be filled with wonder.