@896c3ee86294d9f9c09ee357334aef4be4f7828508aa9810d6938d3ce054cc31
Not sure how, you arent destroying evidence or preventing the cop physically from searching, nor are you even violating any directives. You've just made the situation such that if he wants to search it will be illegal.
That would be like saying not giving a police officer permission to search my house by closing my shades is obstruction of justice.