Modern feminism is nothing to scoff at or call 'overboard.' The people you're referring to are the extremists, as any culture, religion, cult, etc. have had at one point in time - if not now.
Should they be attempting to get equal rights (which from what I've gathered they've already attained due to various movements) then I can understand their cause.
Should they have been brought on board for 'feminism' so they can slander the male gender and bring unequal rights with women on top of the hierarchy, then I would rather they be crushed under the weight of their sin and rot in the abysmal ravine that the wolves throw their cubs to.
The majority of feminists, or should I say feminazis, are only in it due to a bandwagon effect that they feel they must join to be apart of the new fad - which seems to be bashing the male sex as well as create false statements to get their way. They are doing nothing more than furthering their cause in the wrong direction and are making a complete mockery of what they are actually going for. As you said, they should be focusing on the literal events such as the stoning of rape victims in third world countries, the selling and trading of women and children for sex trafficking and even the murder of some women being allowed should the husband become tired of them. Rather, they focus on meaningless and false events that they create to garnish attention from media, their community, as well as the nation in general.
tl;dr - Feminists are fine if they are doing what their true cause entails; Feminazis are not. I for one am a feminist and believe that all life, regardless of sex, should be fairly treated until the specific person has wronged someone or something in any fashion.