Its only "paranoia" if the fear is irrational and unjustified.
Unfortunately recent history is full of examples of abuse of governmental power and the "civilized" ways for the governed (courts, elections) to obtain justice for which have been rendered largely useless for a large portion of the victims.
The court system is not only guaranteed to bankrupt one being persecuted (not to mention that when facing a group of thuggish government officials on a power trip the first step is usually freezing/confiscation of all assets of the victim) but the courts themsevles have proven to be easily manipulated by the government bureaucrats and officials and are consistently siding with various three letter agencies. Even if they are not, their rulings are ignored (such as the recent TSA rulings), until such time when a new, more favourable ruling can be managed or in more extreme cases where the "law" can be reworked post-facto to the power-holder's advantage (such as the "legality" of torture and indefinite detention without trial of Guantanamo detainees).
Similarly, elections are largely meaningless since the US (and increasingly all the other "Western democracies") feature gigantic 2-way, gaudy sporting matches where the spectacle of personality cults and insane exaggerations of minutia differences between two or three facets of the ruling elite are meant to hide the fact that no real (in practical terms) differences exist between the team "red" and team "blue" and they are all working with/for the same elite and its ideology. You are just supposed to paint your face one of these colours and go screeching - spittle flying - at the supporters of the other team, a model successfully borrowed from the Football (or Soccer) scene. Just make sure you do not actually pause to think what you are doing and who benefits from this madness.
Now top it with the obvious trend of the governments expanding their power by leaps and bounds (TSA, extra-judiciary powers of the President to drone-assassinate American citizens he deems "enemies", etc and so on) and instead of making the poster you are replying to look like a paranoiac, you are making yourself look to be - at best - an uncurious, inattentive, "it can't happen here", "I can't hear anything lalalalalala", individual so desperate to believe that everything is "all right" that he is willing to ignore every second news item for a decade or so, or - at worst - an autocratic shill who actually likes the idea of "putting the malcontents in their place" and who worships naked, raw power and believes those who wield it deserve it and therefore can do no wrong.
Incidentally, 3D printed guns are not even a factor in the equations of power and constitute a negligeable "threat", but never the less will be dealt with harshly using hugely overreaching, draconian powers because even a tiny "threat" to the power-holders has to be neutralized immediately or else in can blossom into a much larger one and an unthinkable situation of a significant untraceable group of citizenry capable of physically resisting their government (to however a small degree) would possibly result. And thus the rulers would have to start actually be wary of the ruled, instead of just the other way around. And so "at 3am came balaclava-clad ATF knocking, with battering rams and bags to put on our heads, one for me, one for my wife and two wee ones for our kids, for I was guilty of an Unlicensed Possession of a 3D Printing Device and Printing an Unapproved Object".