Requiring coding tests etc just wasn't filtering more than random chance when I was hiring. I ended up pulling in people who had the most preposterous CVs to see what they were actually like.
One guy was a ninja. A black belt in ninjitsu, apparently. I asked him about his ninja skills (he looked like Harry Knowles). He said he could make himself invisible. I was like O_O. I asked him to demonstrate. He said he couldn't do it right now as we already knew he was there. I told him to leave the meeting room and "come back in invisible." He said it didn't work like that. I asked how it works. He said "Let's say I'm at a party.. I can enter the room and walk completely through the crowded room and not a single person will notice me." I think I know what was happening....
One guy was a ninja. A black belt in ninjitsu, apparently. I asked him about his ninja skills (he looked like Harry Knowles). He said he could make himself invisible. I was like O_O. I asked him to demonstrate. He said he couldn't do it right now as we already knew he was there. I told him to leave the meeting room and "come back in invisible." He said it didn't work like that. I asked how it works. He said "Let's say I'm at a party.. I can enter the room and walk completely through the crowded room and not a single person will notice me." I think I know what was happening....