Do you judge people?

Many claim not to judge people, in fact I did until recently. It sounds wrong just saying it. But in fact I have come to realise that it is human nature to judge others, even if it isn't intential. For example, if a smartly dressed, clean and well spoken man approached you, you would be much less intimidated than if it was a greasy haired, leather clad biker. It may seem shallow and superficial, but that is the sad fact of things - it is human nature. But is this really human nature? Or is it merely due to years of being influenced heavily by the media? This question is almost impossible to answer and extremely subjective. It depends greatly on individual opinion. What do you think?