Originally Posted by
nomadmax
...I find coughing loudly as I approach seems to do the trick.
That's what I do when there's a bunch of people clogging up the aisles at the grocery store.
On my bike, I finally had to get one of those kiddie bells. I felt a little silly the first few times I used it, but I've become convinced it cuts through the wind better and further than my voice does. People hear it.