Seven sons of Sceva

Based on Acts 19:13-20, I am reminded to be more Christ like.The fact the Seven sons of Sceva were bold enough to approach a demon and not be able to cast it out because they were not powerful enough really bothers me. Honestly I find demons a little creepy and don't wish to be around them. These guys had the courage, but lacked the faith. I am astonished that their boldness to attempt to cast out this demon did not elevate their name status. One other thought is that they tried to cast it in the name of Paul. Paul on the other hand always used Christ as his source of power to drive them out. Maybe Paul's name wasn't needed.