I'm glad you're against the lawsuit but sorry that you're also against the law. This thread, of course, is more about the lawsuit than the law so that's the main perspective of my comments.
Reasonable suspicion - not just a "hunch" - is a principle of law under which a law enforcement officer can investigate further. It may lead to probable cause for an arrest or to an immediate release if there is no probable cause. All of this is covered by by the so-called "Terry Stop" case. The Arizona law is completely Constitutional and follows all the proper principles. The DOJ lawsuit doesn't challenge this point so that's not the basis of it.
When people scream "4th amendment violation" around this lawsuit they are, whether intentionally or not, giving the uninformed the idea that this is what the DOJ lawsuit is about. It's not and it's important that people know the truth.
Dragoon,
I am not giving uninformed ideas about this lawsuit, my first post on this issue outlined my opposition to both.
I, as well, do not hold to a prior case on this issue as I believe this case law does not apply (I believe there are limits to stare decisis, Plessy v. Ferguson is one area I believe stare decisis should not have been maintained, and was overturned by Brown v. Board of Education. As well Roe V. Wade was a poor decision that should not be maintained by stare decisis). Again, until someone can show me in the Constitution where it says "reasonable suspicion", I will agree. Otherwise, I believe it is a violation of my constitutional rights. You can have all the reasonable suspicion you want, but you should not stop me, question me, or keep me unless you have probable cause.