This is not the place to criticize past actions, problems or plant personal attacks (however subtle) - onegaishimasu, let's play nice.
First, let's hear a very good sermon by SaigoNoBan:
すみません。みんなさん、ちょと待ってください。 この立派なサイトは、目的が日本語の勉強ですね。私たちは、これに気を付けた方がいい、自分たちの中で怒るよりと思います。 私たちの気力を勉強のために使いましょうね。:|ください。。。
Sorry... Please hold it a little folks... The purpose of this great site is to study Japanese. I believe it's better to concentrate on this, instead of fighting amongst ourselves. Let's use our energies for our studies, won't we! Please...
And here are some suggestions by Mandolin which I think sound very reasonable:
First, suggestions on rules:
Having a double post rule to prevent spam is a good idea. But it should only be enforced to prevent spam. Sometimes a double post is NOT spam, and shouldn't be treated that way.
It might be you want to do it out of fairness, but honestly, the world isn't fair. However, to alleviate the problem, you could change it to "Don't spam" and that leaves it up to moderator disgression as to what is or is not spam, eliminating the delineation of "double post" all together.
Please feel free to post any suggestions or ideas on the issue of rules. Keep in mind the rules are there to keep an orderly and safe environment. I am not an anarchist!