And then I lay down the ground rules, right? Court is now in session, in the name of the Lord Jesus Christ, right? Test the spirits, here's the ground rules--you remember those guys, in the, remember the seven sons of Sceva in the New Testament? No ground rules, they walk and "Hey, are you a demon?" and they then get, like, beat up bloodied running for their life naked. You don't want to be that guy, or gal.
You don't wanna be that. Lay down rules. Before you start talking to a demon lay down some rules by the authority of God through Jesus Christ and enforced by the Holy Spirit.
The problem wasn't that the sons of Sceva didn't lay down any ground rules, the problem was they were Jewish exorcists trying to invoke the name of Jesus to cast out demons without actually having any faith in Christ. This is a rather straightforward polemic that not just anyone can invoke the name of Jesus to cast out demons, only a Christian.
So beyond the ridiculous assertion that Jesus named one guy "Legion" because he had many demons; beyond the wildly inaccurate declaration that if you don't always send the demons to the pit they hurt other people and by so saying forget that Jesus sent demons into pigs that one time; there's this other problem of yet another "ground rule" Driscoll insisted on in 2008 that not only has no clear basis in any biblical text but ostentatiously misinterprets and misapplies a text where things are actually plain enough without Mark Driscoll's "practical" notions getting in the way.