[AndrewP]

I rarely request (I'm in and out of the room, and rarely get to hear the request anyway). Must admit, I have requested long ones, just to "make it worthwhile". I won't do that anymore, given that I just found this thread.
But why not have a little notice on the request page for folks like me who hadn't contemplated how annoying it was to others, and wasn't aware of the etiquette.
It won't help for those who ignore such suggestions, but might help a little.