Most of those are already "bound" males, who put up way less resistance cuz cock-addicts. Technically speaking, "rape" in normal situations is still a crime in the game's universe, it is just that the law is so biased and has so many holes that most futas can get away with it if they are smart about it.
You apparently haven't read the magazine in the classroom where it shows several young teens being bound without choice by jizzing in their food. And that's posted in a public source.
The 'law' is a line full of plotholes throughout the whole story. It only seems to actually be active very rarely.
Like when Diamond and Garbage Futa who announce they're about to go out and bind you against your will in a public place. Then procede to do so out back. Then they abandon you, which is also illegal. Pretty sure that was said in one of the lines.
Or when you get the 'fail' during the fuck bike job. And then Draga quite blatently ignores the law for a couple extra bucks.
Hell. There's even the scene where a futa rapes one of the politicians on live television, and no one does anything.
That doesn't even take into account the several times characters break into your apartment and bind you through rape. Mallory and Rae both do that.
I'm a little iffy on one of the church scenes, though. When the guy on the bench talks to one of the....nuns? We see no consent. Just the aftereffects of the futa cum when he's against the tree.
So, no. The 'law' may as well not even exist, since the game itself keeps punching it full of holes. Using it as a defense is silly at best. There is no need for 'being smart about it'.