Please identify one feminist, anywhere on the Internet or in books, who claims that non-consensual pregnancy and subsequent child support cannot ruin a man's life.
 
Hell, identify one feminist who thinks that man in your hypothetical wasn't raped.
 
This ain't feminists disadvantaging men.  It's the patriarchy harming everyone.  Being "weaker"/female means you get raped more often.  Being "stronger"/male means that when something painful and traumatic happens to you, nobody cares.  See how everybody loses, and then you and I have to dispute whether this is a zero-sum game to begin with?
 
Anyway, your last question--most crimes, including rape, in most states, have an intent element.  Most states also don't let you get wasted and say, "Hey, I was blind drunk, I didn't intend to rape zir!"  They say, "You intended to get drunk.  We charge you with the consequences."  It's crude but effective, for example, in cases where a drunk driver kills a car full of teenagers.
 
 I'm a lawyer but not your lawyer.  Your state probably has weird rules and exceptions to this, just like every other state.