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On Monday, supporters of the Standing Rock Sioux Tribe’s protest against the Dakota Access Pipeline began a viral campaign enticing people to “check in” to the reservation on Facebook as a way to “overwhelm and confuse” local law enforcement.

However, there is no evidence that this tactic is effective, particularly when the Morton County Sheriff’s Department expressly said on its own Facebook page that it “is not and does not follow Facebook check-ins for the protest camp or any location. This claim / rumor is absolutely false.”

In recent months, activists have been protesting at the site on the border of North and South Dakota in an attempt to halt a planned oil pipeline that many believe would damage the local water supply and desecrate tribal lands.