It's your choice to be pissed off but let me be as clear as I can. I stated a fact about your lack of understanding as to what I said. How you take that statement is your concern and not mine. Could I have worded what I said differently. That's possible but you would have just as likely construed it in a negative manner regardless of how I worded it.
Actually, Delaware v. Prouse does deal with check points. It deals not only with roving patrol's, random spot checks but also check points. It focuses on each of these areas both in the holding, majority opinion and the dissenting opinions of the case. It further cites relevant case law. The persuasive nature of the case while not mandatory is relevant to the issue at hand.
I did note the language in the case and the reason I cited it was because it dealt with more than just one of the areas we were discussing. I could have cited other cases but none of them addressed the whole of this discussion and would have been to narrow so I chose to cite the case that builds upon most of the others. Your attempt to make this case solely about roving stops ignores the fact that this case is a persuasive precedent and applies to the issue at hand.
To the question of what is the acceptable level of intrusion that may be applied in a checkpoint stop, just admit that you don't know. It is okay. With respect to stopping illegal immigration, I don't know either. We discuss the issue with respect to sobriety checkpoints because this is where most of the law pertaining to checkpoints comes from.
Delaware v. Prouse deals with roving stops, and the court in the last paragraph of the decision makes clear that the holding does not apply to checkpoints, as these (properly conducted) do not involve the same level of discretion.
"This holding does not preclude the State of Delaware or other States from developing methods for spot checks that involve less intrusion or that do not involve the unconstrained exercise of discretion.
Questioning of all oncoming traffic at roadblock-type stops is one possible alternative."
Because you didn't provide any further cites, I will do the work for you. The following cases both discuss the level of intrusion that is permissible at a checkpoint (whether the state can ask questions of the driver, or even demand documentation).
Maxwell v. City of New York (2nd Cir. 1996) (upholding right of police to question vehicle drivers attempting to enter a high crime area and suggesting (see FN) that if the drivers don't answer, they can be denied entry) (I don't have the proper cite, but it should be easy enough to find on Findlaw, Westlaw, or Lexis)
United States v. Martinez-Fuerte , 428 U.S. 543 , 96 S. Ct. 3024, 49 L. Ed. 2d 1116 (1976) (involving right of state to question and request identification of persons at checkpoints within 90 (I think) miles of border with Mexico) [I know that you must know this case b/c you discussed the facts of it in an earlier post]
State v. Orr (2001), 91 Ohio St.3d 389 (Upholding validity of checkpoints stops to identify unlicensed drivers) [Good discussion of federal and state case law contained within.]
As I said, I don't know what the acceptable level of intrusion is with respect to checkpoints for illegal immigration, but your blanket assertions that the police cannot under any circumstance demand documentation and that one is always free to refuse to talk to the police at a checkpoint and then go on their way is wrong.
Don't worry Eddie, I can understand you. The concepts that we are dealing with are not that complicated as to be beyond my grasp.
P.S. You aren't a first year law student by chance?