Well, if we're going to go reaching for the fallacy labels -- that's a pretty textbook appeal to extremes. Discrimination against any portion of the population is reprehensible. But the big moral challenge is determining what exactly constitutes discrimination. Where is the line between just punishment under the law, and discrimination?

Society's laws are designed to protect the interests of everyone in that society (without discrimination!) from those around them that would hurt them, whether through malice or negligence. Implicit in those laws is the idea that you seem to be protesting: that in certain situations, Person A knows better than Person B what's good for Person B. Or, as it may be, what liberties to withhold from Person B to protect others from them. That's prison. And as fucked up and inhumane as I think the American prison system is, I don't know whether it's really possible to have a society without _some_ sort of way of withholding certain rights from people for the protection of others.

And yes, that line of thinking absolutely can (and does) slide down the hellchute into totalitarianism. Avoiding either extreme of that spectrum is the challenge of living in a democracy (or what masquerades as one these days).