Re: [drupal-devel] [feature] introduce a "cron" user to fix various cron related issues

Perhaps another option is to give special users a user ID close to 2 147 483 647 (MAXINT). That way it won't interfere with existing users.

I smell Y2K here, but Y2K was sure to happen sooner or later, I do not think a Drupal site with two billion users will happen anytime... Still, I think negative UIDs are future safer.