I have some sympathy for the OP. I, and a whole lot of others, have been stacked up behind a headphone wearer oblivious of our existence. Gentle polite requests of excuse me and tinkling bells were of no avail. I gradually increased the request volume until I gave it everything. It broke through. The guy was so surprised he jumped up and nearly fell off which could have caused a domino crash. So I was in the wrong too ....