Algorithm:
- Check https://lols.bot database. If spam, ban
- Is it the first message by this user in this group? If not, pass
- Does the first message contain link, image, or stop words (работа/доход/etc). If not, pass
- So now it’s the first message and it looks sus, we ask user to write a reply with the word “не бот”
- User replied within one minute? Great, add them to whitelist
- Otherwise, ban