Women fear when men whistle at them because occasionally one of those men attacks them physically.

I can understand how this danger teaches women to react to whistling with fear. It is considerate not to whistle. It does not follow that whistling is wrong.

That a fraction of people that do A also do B, where B is wrong, does not imply that A is wrong. It would be unjust to criminalize whistling because of what a small fraction of whistling men go on to do.

I wonder, though: if we could end misogynist violence against women on the street, would women cease to feel frightened by whistling?