I am a daily bike commuter in Berlin. I think dickish people are evenly spread on all transportation modes. Difference is, dickish car drivers kill people, dickish biciclists don't. There has been 9 deaths of biciclists in Berlin in 2017[1] so there is definetely a reason for higher identifiability for car drivers.
Sorry, I was not aware that Sabine is not obvious in english. The picture in the top right could also have been a hint.
It is not about it being "100% woman" but about "male" being the default. I think it is telling that the assumption seems to be physics -> male. If this would have been about social issues or fashion, maybe the people would have checked before assuming male gender?
I don't say it does not happen to me too, but if it happens, I think it is good to raise awareness.
[1] http://adfc-berlin.de/radverkehr/sicherheit/aktionen/62-geis...