Instead of making prefixes compulsory, I added this notice above the new thread editor:
However, very few people pay any attention when creating a thread.
Is there a way to have a radio button selection for the countries listed above the editor, instead of having a dropdown prefix box? I could use some CSS to show flags for the prefixes and it would encourage users to select one then.
I'd prefer to go down that route rather than enforce selecting a prefix (even if I include just a "N/A " one for global queries).