This is more than just 'feminism' obviously. it's a tool to move us towards a more dictatorial society. You remove the power from the men and the society is easily conquered. Feminism is an easy tool to use to push forward this agenda because women think that this 'empowers them', and weak male feminists will get behind this because they think it will endear them to women. Think about how powerful this makes the police if they can arrest you for spreading your legs a little too wide on the train.
The whole point of feminism is to undermine and neuter men, as well as destroy the family. Once you remove the men out of the way, society is very easily controlled. Instead of violently controlling men, just give women a variety of tools to lock men up, such as via 'catcalling, 'manspreading', and the child support/alimony system.