Whether you say on the left, right, up, down, or Mars, please say something - anything!

The other day I was riding up a hill and had slowed a bit to reach for my water bottle. Some yahoo, blew past me on the right, saying nothing - mind you there was maybe 2 feet between me and the sidewalk where I was riding. No warning, nothing.

I find that totally irresponsible and dangerous as all it would have taken was me moving a few inches to the right and bam, crash because of some moron.