I think what KG says sums this up pretty much.
Being Honest, I don't think I read the rules when I came. I only got round to reading them when I had been here a couple of months already. But I, like all newbies, didn't keep to the rules exactly, however though, I assumed that it would be pointless to make spam threads. I learnt what threads that weren't completely spam, just not allowed, were not acceptable by reading them, and seeign they were locked. If we just deleted them, we wouldn't be able to learn from them.
Also, as for blaming the n00bs for not reading the rules, although they should read them, many of them should in reality be common sence. I am no Mr. perfect as an example, but if you stopped to think, is there a point in this thread? Without reading the rules, you could tell to an extent what you should be doing. Rules on advertising, signiture length, etc are a different story, but rules on spam, flaming, and others, are just common sence. These are the kind of threads that are most commonly locked, so I think that the cause is not that we don't read the rules, but we can't be bothered to think if what we are doing is necessary.