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Even the courts cannot agree on whether geofence warrants are legal, likely setting up an eventual challenge at the U.S. Supreme Court. While Google is not the only company subject to geofence warrants, Google has been far the biggest collector of sensitive location data, and the first to be tapped for it. Although the companies have said little about how many geofence warrants they receive, Google, Microsoft and Yahoo last year backed a New York state bill that would have banned the use of geofence warrants across the state. The data showed Google received 982 geofence warrants in 2018, then 8,396 geofence warrants in 2019, and 11,554 geofence warrants in 2020 — or about one-quarter of all the legal demands that Google received. But there is hope that Google shutting the door on geofence warrants — at least going forward — could significantly curtail this surveillance loophole.