1) Well, mate, I'm sorry to break it to you, but if you're a man, it makes sense to assume that you don't suffer from everyday sexism the way a woman does
Now you just made an assumption based on the experiences of all women and all men. So you are talking for all women and men and are delegating out traits that will apply in all situations.
Goodness is checking your privilege just the overflowing font of equality in that: It is equally sexist to both genders.
But how about you list those Privileges that a MAN has? Not "Men", a Man.
I mean let me think of things I experienced: I've been objectified, I've been cat called, I've been sexually harassed, sexually assaulted, I've been denied consent, I am scared to go outside at night, I have to dress and act a certain way if I want to be taken seriously, things built for the majority do not suit my needs, the media doesn't represent me.
How is the "Do something about it" misuse?
I have a chocolate bar, I should do something about it. I am homeless, but I am a man... I should do something about it.
The way it is positioned is hilarious! Because she says you aren't a bad person for being privileged, but goes on to essentially say that your privilege should be dealt with as if it is a disease or some mortal sin.
At BEST it could be that you should use your advantages to help others. Yet that isn't the way it is positioned, because it is an accusation.
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Which I guess is the ultimate problem with "Check your Privilege" as you proven... it isn't an exercise it is an accusation, and assumption.
Perhaps it can't be used correctly period.