Maybe I should rephrase. When I say I do it, that means I do it. It does NOT mean it's necessarily a good idea for anyone else. I've thought about whether I'm willing to take the chance that I get arrested even if it's a clear violation of the law and my rights. While a student (broke and dependent on my parents) I didn't feel it was right to take that risk because, knowing my parents would help out, I was playing with other people's time and money.
Now I'm on my own, have my own job and home, and I've decided that now is the time to start making small stands as the opportunities arise. I agree with Glenn that anyone who is going to take this kind of chance should think it through and try to think of the ways someone could screw you, 'cause somebody will try it. But I think it's essential that somebody do this sort of thing, and I recognize that not everyone is in a position to do so. Fine. But I used the excuse that I wasn't in a position to do it long enough. Now I am, so I want to do my part.
All that doesn't mean that I'm trying to provoke some showdown with the police. I respect the cops, but I also know something of how hard it is to be one and I know not all of them keep up with politics or new laws. I also know that some have deceptive superiors who are actually willing to lie to their officers--like the former head of the Illinois State Police, Terry Gainer. And I believe that most cops will give me a chance to explain politely that I don't believe what I'm doing to be against the law, and that most cops will at least take a moment to read the law (in IL, I use a Q&A article written by one of the new heads of the State Police--it has a more official feel to it and is more convincing than some copies of the bare statute I've used.)
Therefore the risk is that I run into the rare cop who's so bullish he won't let me speak or read a copy of the pertinent law. I accept the chance that I'll run into that individual as the cost of the way I choose to live to the limit of the law. Again, that does not mean that you will or should choose the same thing.