Well, it certainly didn't take long to figure out what you're all about.
It's funny when you engage with someone who demonstrates a lack of sensitivity, and less than three comments later, they're sending you links to an anti-feminist rag that has little credibility and a transparent agenda.
Oh, for fuck's sake. Your post was basically a bunch of whining about how people can't talk about women's issues, because men have it bad too, or something.
Here's the thing: sexist, patriarchal bullshit is harmful to men AND women. So the "sexist status quo" is damaging to everyone. If you actually are interested in learning about how sexism is damaging to men (which it sounds like you are), you'd probably be interested in a documentary by Jackson Katz called "Tough Guise."
You don't have to file taxes in the U.S. if you don't get a tax ID number or SSN. Another commenter stated that getting an SSN is not required initially.
If the kids ever decide they want to move to the U.S. for school, work, or any other reason, they'll have a much easier time if they are citizens. I would say, talk to a lawyer first, but definitely consider it.
Living on Earth may be expensive, but it includes an annual free trip around the Sun.