TSA was created as a response to the September 11, 2001 attacks.The TSA requires that passengers show a valid ID at the security checkpoint before boarding their flight. At the airport security checkpoint, passengers are screened to ensure they are not carrying prohibited items. These include most sorts of sharp objects, many sporting goods such as baseball bats and hockey sticks, guns or other weapons, many sorts of tools, flammable liquids. In November 2010, the TSA began putting backscatter X-ray scanners and millimeter wave scanners machines into airports. The TSA refers to these two technologies as Advanced Imaging Technologies, or AIT.
Well I think those people had any idea that they will be filmed at the airport, lucky them got themselves posted on such a platform by the great @adamkokesh many of them thought that its a good thing introduced after the 2001 attack, but some of them thought its just the wastage of time. But according to me TSA is really doing a great job, number of people used to smuggle drugs, weapons and things like that via the airports, but by the help of TSA it has reduced a lot. Keep it up TSA.