There is no hard-and-fast rules for ousting members. Some guidelines are presented.

I suggest that a number be established within a time frame. The number be X, and the time frame, a period Y.

In this scheme, if any user can be shown clearly without a shadow of doubt that the user uttered greater than X number of logical fallacies within a time period of Y, then the moderators can be asked by users to exclude the offender from membership. Temporarily at first offence, for a longer period temporarily for the second offence, then permanently at the third offence.

I suggest, X to be 10, and Y to be a week (seven days duration). There would be a time period Z, the passing of which past the last day of Y would declare amnesty for the offender. That is, if no one brings a complaint against the offender by the end of Z, then a statute of limitations will apply after Z period, which could be a month (Z=30 days).

I really wish this to be made effective. It is a philosophy forum. Here the only "judge" should be reason and lack of ill or faulty reason. If someone keeps using faulty reasons, by way of using fallacies and other errors in arguments, then it must be punished, for they insult the judge itself.