Another large forum tried to make this a rule. There was even a reminder posted when you hit "new thread". It rarely worked. It made me more aware when I was a newer member on that forum, but it didn't work for everyone. You'd see things like "emergency!!" "disaster!!!" "help!!" The content would be anything but a disaster or an emergency. It is what it is and being descriptive may be helpful, but I think the threads with non-discript thread titles get a fair amount of views. I know I click every single time.
It could be posed as a suggestion, but it may not always be followed.