Hi Khethil, I would like to say that I appreciate and enjoy the opinion and thoughts you state and therefore the topic you have opened. I know you are right and I know a lot of people cannot operate in the way you advocate. I will not get into the subleties and the workings of the mental processes at this time, but there are a few things I would like to say.
The thing of it is that before one starts to shut onself off from the rest of the world and just claim one is right one has to accept that, as you say, one is fallible. That is often complicated by the way people state that the other party is 'wrong'. For 'wrong' creates a feeling of 'shame' in someone and often translates into 'guilt' in the eye of 'society'; at least Nietzsche argues that this is how 'aesthetical ideals' are 'utilised' as 'thought-objects' in the brain.
In that sense, if one wants to stimulate 'open-mindedness' one first has to stimulate the feeling that although one is 'wrong' and 'right' (or 'truth') mey be something to strive for, there is no shame in being 'wrong'; perhaps there may not even be such a thing alltogether, and there only are different angles from which to approach a question and therefore a different thing is being highlighted so all opinions might just be true. This angle emphasises the importance of 'digging' out the opinions of others, for instance, because it show another part of the object of the discussion.
However, I think the most important thing that might come out of this topic is that telling people who, in your eyes, behave 'wrong' have nothing to be ashamed of. Everybody is 'wrong' now and again and that it is ok to be 'wrong'. Perhaps a notion of skepticism might be valuable at this point: stating nobody knows what 'correct' is in the first place and judging another might be a little silly considering this (<--hands Kethill, who is sitting on the side of the sandbox, a shovel
It is strange to realise that even the point you are making can be forged into just the 'aestheical ideal' that creates the situation in which one can claim to be 'right'; the remark made did fit the 'aesthetical ideal'. This is called a circulatory argument and points us towards the value of skepticism again: the only way coming to a true (even though one can still be wrong) judgement is by not assuming a truth, but by honestly observing and investigating a subject. And this is Khethil's point I think.
So, all you people out there who are so 'wrong', don't be ashamed, because so am I!
*tries to get his foot out of his mouth*
p.p.s. I hope you don't mind me using you as an example Khethil. I know what you are saying and I agree with you. I merely ment that every picture one paints becomes an 'aesthetical ideal'.