Stay Out Of The Basement (2) - S1-E13
Stupidity: When the real Dr. Brewer is found in the basement, he has duct tape over his mouth and needs his daughter to remove it for him. His hands are tied around the wrist, but not behind his back, so he could have easily removed the tape from his mouth himself long before he was found.
Answer: He repeatedly warns him against using the universal remote for bad purposes. However, Seth, blinded by remote's abilities, completely ignores and disregards Tony's warnings and uses the remote when and how he pleases, which eventually turns against him.