SWAT teams are becoming more and more aggressive in their search and seizure tactics during drug raids, and they inflict greater trauma on those being searched. Professor Weisberg is quoted here about the use of search warrants:

"The United States Supreme Court has never actually said that the warrant must be shown," said Robert Weisberg, a professor at Stanford University Law School. "As the court says, the real purpose of a warrant is not to give any sort of notice to the person whose privacy is being invaded, its purpose is to have a branch of government to monitor the police," Weisberg said.