not sure what the point of this post is... even if it reached the persons on the bikes, even if they took heed of your warnings, even if every biker on TR read and agreed to end that behavior, you'd still have this happening. Theres a few certainties in life...

A) taxes
B) the sun will rise tomorrow
C) hondas get stolen
D) you will get lowballed on tr classifieds
E) kids on bikes (and cars) have more balls than brains

But i suppose the message bears repeating anyway