So you are going to let them intimidate you into giving up your rights?
If you are within your rights to refuse a search there is nothing they can do. If they search anyway then you can not is anything they find inadmissible in court, but you can file an Internal Affairs complaint and get the ACLU involved.
Cops know the law, and they might not be happy about you denying them a search but there is nothing they can legally do about it. You are within your rights.
My favorite is if you get pulled over and they ask "do you know why I pulled you over today?" That is just fishing for an admission of guilt. If you decide to contest the ticket the cop can show up and say you admitted guilt at the scene. Keep your mouth shut and say as little as possible.
I don't know about you, but I'm not about to give up my rights so easily. Most cops will back off if they see you know the law because they don't want to get sued or have a complaint filed against them.
Look I'm not saying you're wrong. I get the point... just saying in some cases it's better to admit you did wrong and not play games with authorities. Maby they cannot do anything in right away but eventually there will be a situation in which the police can decide to be rough with you or gentle. At that moment they will remember if you were a dick to them or not.