(In the following I use the pronoun "You" - this is not referring to Dim, it is the general usage of the word, meaning anybody in the situation described; people in general.)
Personally as an internet user and moderator of
OTHER forums (and
not speaking as a moderator of this forum) I think if you are banned you are banned. If you believe you were "wronged" then you can always go and frequent a different site - or contact the site admin directly via the contacts page and register a complaint. If I have been banned, and I believe the moderators of the site generally appear to act fairly, then I would sit and take the punishment because I would have done something to deserve it.
Generally speaking, you should fairly expect to receive a warning for behaviour that is likely to lead to a banning if it continues. These are events that are at the fringe of the forum rules and at risk of stepping over them. It is at this point that you have the opportunity to explain/discuss/reverse that behaviour and you will then be assessed upon the reaction to that warning. the warning will be one record and will be taken into account in future situations.
However, where the behaviour blatantly breaks the rules of the forum, a warning is not necessary and should not be expected/demanded. You read the rules when you signed up and so you will know that what you have done has broken them and you will know that a punishment is appropriate. In these cases, I really, truly, deeply, do not care how many supposedly 'nice' posts someone has put up in their time on a site. when someone completely breaks the forum rules regarding offensive behaviour etc they should be assessed on the act itself. The rules should not be biased against Noobs who don't know better. If anything they should be biased AGAINST long term members. After all, they have been on the site long enough to get a very good feel for what is appropriate and what is not.
I have much higher expectations of good behaviour for my 5 year old than I do of my 18month old.
If that annoys the member and they choose not to learn something from it then that implies that they are likely to re-offend or engage in larger infractions rather than just getting on with it and going back to being a good member of the discussion. In which case their further punishment should once again not come as a surprise.