The person comparing cyclists to cockroaches has not responded. My friend did say "Grey, I see bikers here who do try to be careful, but there are so many aggressive and selfish bikers up here that I won't use bike/jog/walk trails now. I am tired of getting bullied just because I walk."
Those cyclists are in the wrong - nobody should be afraid to walk on the shared trail. I know they are probably weekend pleasure riders who don't know to call out "on your left" - still it produces hatred, and that hatred gets moved to the road...