Fallacy examples

The biggest fallacy that I think of when political activists say something like,"If we don't rid ourselves of the patriot act, the government will trample our rights of privacy." The patriot act allows access to people's homes with wire taps and searchs without a warrant. Now in reality this is rare, and is only applicable to "drastic cases" of possible terrorist activities. Though I don't think our constitutional rights will crumble. I think that this fallacy has a point in stating that where does someone draw the line when it comes to what the government can do. Though fallacy in general is usually mostly false, it sparks in us a skepticism that is healthy and should be explored in every situation, by an intelligent person.