I think there is certainly a place for a properly considered, rational judgement. One can't live in reality without some measure of judgement of other human beings, and if one tried to live completely without judgement one would not only be an apathetic relativist, one would simply not be able to function. People should know whether this person or that person appears to be someone to avoid, whether someone has just committed a crime or not, or should be tried for the possibility thereof, etc.
ON THE OTHER HAND, people falsely judge people all the time. They judge people wrongly for their looks, likes, tastes, etc. They stereotype, they assume, etc. There is nothing wrong with preference "I like Pepsi better than Coke". But people often do not just state their preference, they try to make their preference a law, a universal judgement, "Pepsi rules, Coke is SHIT". I see this sort of immature ignorant judgement all the time at the Internet Move Database Forums. This movie is shit, that movie is not, etc. Certainly there is some cause to state whether the makers of certain films have been lazy, have produced a cheap product etc., but even so there is still a big difference between a film that is cheap simply because it has little budget (yet still has a plot, actors who don't just sound like they are reading their lines, etc.) and a film that is really just trying to make a quick buck off of a name and a misleading trailer, makes itself out to be more than it is, and looks like something two ten year olds made in their back yard.
So, I guess to sum up, I would say that its situational. Sometimes one has to make judgements, sometimes one should avoid it. Rationality, having common sense, and being considerate, should be our guide.