Airline madness

 Ever since the attack of 9/11 ,  international airlines have made tighter rules on airport security , now you cant bring more then 100 ml in total of liquid in your luggage/carry-on but still allowed to bring a small samples etc.. , but no one knows what going in or whats going out, many people who the US considers terroristes are smuggling ang transporting illigal things all over the world and committing many crimes, and each year something bad happens  wich creates more strict rules , like when a man attempted to blow up a device while the plane was still in flight or when in the past couple of days  ,they have found explosives of some kind on a cargo plane going bound to the USA from
Yemen and now Canada has banned any coming or incoming cargo/travaleing flights from Yemen. What do you think they should do ? .
In my opinion, is that i think they are taking it too far with airport security, and i just think that the've had a better idea of dealing with it but never felt like using it . I think some airports in the world are descrimininating other people, because everytime a person is wearing a type of clothing, they think they are a bad person (terrorist) that wants to cause violence . If i got the chance of making a differance, i would tell them that they should stop these bad things and just act like human beeings.
In my opinion i think that wars are started this way, just like the war in Afghanistan.