Тема на орге:

What this Mod does:

1. Runs a daily cronjob, removing all members according to the script's configuration
2. Exclude selected usergroups from been pruned
3. Flag automatically selected user(s) for pruning after x days (7 by default)
4. Email automatically selected user(s) that have been flagged (on by default)
5. Has the ability to prune users that match ALL the following conditions:
1. Has not visited in the last x days (30 by default)
2. Has not posted in the last x days (30 by default)
3. Has x or fewer posts (0 by default)
4. Has been flagged for pruning earlier than x days (7 by default)
6. Send email to pruned users, notifying them of their change in status membership (on by default)
7. Send email to the admin (webmaster) for book keeping.


Automatic Inactive Users Pruning - vB3.7.zip

А на русский можно перенести его?

Вот сделал перевод комментариев в файле. Инструкцию по установке переводить не стал, и так всё понятно. Залить, настроить и поставить в cron.
Но не проверял, работает ли сам скрипт или нет.