Don't yell at anyone. Figure out the mistake and help them to correct it. If you're impressed by who someone is and that sort of thing then don't do it because

Don't yell at anyone. Figure out the mistake and help them to correct it. If you're impressed by who someone is and that sort of thing then don't do it because you never know where they will be in 5 months, let alone 5 years. If you're just a decent person don't do it because it's disrespectful and you bring disrespect to yourself by treating others that way. It also shows you to be out of control with your emotions. One of the things that struck me most in the past few days was while waiting in line to get into Hipmunk party @ SXSW to see Alexis outside handing out bottles of water. Out of all the people I've met, ideas tossed around for startups, everything @ SXSW, Alexis had the most impact on me in terms of his dedication to helping people out.