Aslt,
True but they have to have sufficient cause to get a search warrant as in the Jarka case. You have a big issue with the bill of rights with reguards to illegal search and seizure, they generally are not given out frivolously. Any information gathered illegally and without your permission will wind up getting thrown out in a court of law.
While being careful to not resist a duly constituted authority, one should never consent to a search for that will destroy your claim of illegal search and seizure later in a court of law.