perhaps on the flip side of the coin, the riders feel that you may be being rude to them? I know it is a odd way to look at the situation, but perhaps some action (you may not even be aware of) creates a negative response by other riders... I have not met many negative cyclists, (perhaps a negative fred or two, but that is another issue ) and 90% of the time when I see another cyclist I will smile and wave, or say hi, guess I'm too friendly for someone to be mean to?