I don't agree with the notion that flags and banners constitute kopite behaviour. After all, there are not many other objects you can take into the confined space of a football crowd. We wouldn't be copying, just making use of the limited tools at our disposal.
Singing is always good and should never be discouraged but if it's in a designated area and simply continues whatever course the match is taking it is bound to lose some impact.
We all agree that if the team is positive and performing the atmosphere takes care of itself. Rather that try to replicate this atmosphere throughout (which I think is probably impossible) we should be concentrating on creating a more positive atmosphere when the match is at a lull. We should strive to keep the moans and groans to a minimum, be more aware of how, when the crowd is quiet, those groans are amplified to the general detriment of the team's confidence.
We need to be more aware of the difference we can individually make to the atmosphere by being a lot more patient and not try to show those fans around us that we are better supporters because we are the first to get upset.
If we are more positive, more forgiving of small mistakes the underlying atmosphere will improve, and from my point of view it's always been the underlying atmosphere that has let us down.