My understanding is. If you are being detained, and the police have good cause to detain you, then the powers the police have are greater. I don't know how far that goes, and if it involves confiscating personal items. If they don't have good cause then they are on a sticky wicket. BWFC/Hotel security cams and police body cams could help. Either way if you are going to pursue it they will be checked. Personally I think it's not worth it. But I wasn't part of it.