The first reported case involving the review of a sneak and peek warrant was United States v. Freitas.6 In Freitas, DEA agents obtained eight warrants to search numerous sites used in a large-scale methamphetamine operation. Before those warrants were executed, agents applied for and obtained a sneak and peek warrant for one of those locations to "determine the status of the suspected clandestine methamphetamine laboratory."7
Yep, they're only using this provision to fight terrorism...
Hey! Don't you know that drugs fund terrorism? < /sarcasm>