Wikimedia-Site-requests often receives last minute requests for IP throttle exemptions from event organisers. This may happen due to unfamiliarity with phabricator or the technical nature of making a request.
A possible solution
If an event organiser was prompted through the Programs & Events Dashboard to enter an estimated number of participants, and if this number was greater than (for example, 10) the organiser would be prompted to create a phabricator task. If possible, the dashboard could go as far as automagically creating a task.