Goddamn you bitches whinge more than my mom. get you panties straightened and don't modify your cars if you don't want to be defected. If the parts on your car make you stand out from regular roadgoing traffic (be it bodykit, paint, tint, super green HID headlights, loud exhaust, full sik BOV etc) then obviously you're gonna attract attention from the constabulary.
Now, if those parts don't meet ADR standards or if the police have any suspicion that they don't they will defect you so that someone with the proper technical background can check it out. The work can be done by Nissan themselves, and if they don't meet ADR's OR your local state VSI's then they are well within their rights to issue you a defect.
Stop having a cry and harden up. If the going gets too hot, then get out of the frying pan.
Your friend is must have been unaware of the fact that the first thing most police do when they issue a defect for bald tyres is stick around to see if the person drives the car after specifically being instructed that the car is no longer allowed to be driven on those tyres. It dosen't matter how close he is to home.