Users have been assigning tickets via the Requests window / grid.  When they choose the technician, they are often choosing Group = "No, just select technician", then choosing the technician's name.

The problem is that most technician's monitor their queue, or other team members in their group monitor the queue, and do not see these tickets.

Is there any way to prevent this?

I've tried:

1) Making the field mandatory in the template.  However, since they're changing via the grid and not the template, it does not go through the validation.

2) I created a Business Rule to look for Group = None, but it looks like the Business Rule does not trigger.